diff --git a/etiquette/decorators.py b/etiquette/decorators.py
index 64ae398..0bbb3a6 100644
--- a/etiquette/decorators.py
+++ b/etiquette/decorators.py
@@ -42,7 +42,7 @@ def required_feature(features):
                     raise exceptions.FeatureDisabled(feature)
 
                 else:
-                    raise ValueError(f'Bad required_feature: "{feature}" led to {cfg}')
+                    raise ValueError(f'Bad required_feature: "{feature}" led to {cfg}.')
 
             return method(self, *args, **kwargs)
         return wrapped_required_feature
@@ -86,7 +86,7 @@ def transaction(method):
         try:
             result = method(self, *args, **kwargs)
         except Exception as exc:
-            photodb.log.debug(f'{method} raised {repr(exc)}')
+            photodb.log.debug(f'{method} raised {repr(exc)}.')
             photodb.rollback(savepoint=savepoint_id)
             raise
 
diff --git a/etiquette/helpers.py b/etiquette/helpers.py
index 08bde38..c919e90 100644
--- a/etiquette/helpers.py
+++ b/etiquette/helpers.py
@@ -233,7 +233,7 @@ def hyphen_range(s):
     elif len(parts) == 2:
         (low, high) = parts
     else:
-        raise ValueError('Too many hyphens')
+        raise ValueError('Too many hyphens.')
 
     low = parse_unit_string(low)
     high = parse_unit_string(high)
@@ -406,14 +406,14 @@ def split_easybake_string(ebstring):
     ebstring = ebstring.strip('.+=')
 
     if ebstring == '':
-        raise exceptions.EasyBakeError('No tag supplied')
+        raise exceptions.EasyBakeError('No tag supplied.')
 
     if '=' in ebstring and '+' in ebstring:
-        raise exceptions.EasyBakeError('Cannot rename and assign snynonym at once')
+        raise exceptions.EasyBakeError('Cannot rename and assign snynonym at once.')
 
     rename_parts = ebstring.split('=')
     if len(rename_parts) > 2:
-        raise exceptions.EasyBakeError('Too many equals signs')
+        raise exceptions.EasyBakeError('Too many equals signs.')
 
     if len(rename_parts) == 2:
         (ebstring, rename_to) = rename_parts
@@ -423,7 +423,7 @@ def split_easybake_string(ebstring):
 
     synonym_parts = ebstring.split('+')
     if len(synonym_parts) > 2:
-        raise exceptions.EasyBakeError('Too many plus signs')
+        raise exceptions.EasyBakeError('Too many plus signs.')
 
     if len(synonym_parts) == 2:
         (tagname, synonym) = synonym_parts
@@ -432,7 +432,7 @@ def split_easybake_string(ebstring):
         (tagname, synonym) = (synonym_parts[0], None)
 
     if not tagname:
-        raise exceptions.EasyBakeError('No tag supplied')
+        raise exceptions.EasyBakeError('No tag supplied.')
 
     tagname = tagname.strip('.')
     return (tagname, synonym, rename_to)
@@ -451,7 +451,7 @@ def truthystring(s):
         return bool(s)
 
     if not isinstance(s, str):
-        raise TypeError(f'Unsupported type {type(s)}')
+        raise TypeError(f'String should be {bool}, {int}, {str}, or None, not {type(s)}.')
 
     s = s.lower()
     if s in constants.TRUTHYSTRING_TRUE:
diff --git a/etiquette/objects.py b/etiquette/objects.py
index 62998ee..50ff7b3 100644
--- a/etiquette/objects.py
+++ b/etiquette/objects.py
@@ -254,7 +254,7 @@ class Album(ObjectBase, GroupableMixin):
             return ''
 
         if not isinstance(description, str):
-            raise TypeError(f'Description must be string, not {type(description)}')
+            raise TypeError(f'Description must be {str}, not {type(description)}.')
 
         description = description.strip()
 
@@ -266,7 +266,7 @@ class Album(ObjectBase, GroupableMixin):
             return ''
 
         if not isinstance(title, str):
-            raise TypeError(f'Title must be string, not {type(title)}')
+            raise TypeError(f'Title must be {str}, not {type(title)}.')
 
         title = title.strip()
         for whitespace in string.whitespace:
@@ -563,7 +563,7 @@ class Bookmark(ObjectBase):
             return ''
 
         if not isinstance(title, str):
-            raise TypeError(f'Title must be string, not {type(title)}')
+            raise TypeError(f'Title must be {str}, not {type(title)}.')
 
         title = title.strip()
         for whitespace in string.whitespace:
@@ -577,12 +577,12 @@ class Bookmark(ObjectBase):
             return ''
 
         if not isinstance(url, str):
-            raise TypeError(f'URL must be string, not {type(url)}')
+            raise TypeError(f'URL must be {str}, not {type(url)}.')
 
         url = url.strip()
 
         if not url:
-            raise ValueError(f'Invalid URL "{url}"')
+            raise ValueError(f'Invalid URL "{url}".')
 
         return url
 
@@ -1090,10 +1090,10 @@ class Photo(ObjectBase):
         self.photodb.log.debug(old_path)
         self.photodb.log.debug(new_path)
         if (new_path.parent != old_path.parent) and not move:
-            raise ValueError('Cannot move the file without param move=True')
+            raise ValueError('Cannot move the file without param move=True.')
 
         if new_path.absolute_path == old_path.absolute_path:
-            raise ValueError('The new and old names are the same')
+            raise ValueError('The new and old names are the same.')
 
         new_path.assert_not_exists()
 
@@ -1197,7 +1197,7 @@ class Tag(ObjectBase, GroupableMixin):
             return ''
 
         if not isinstance(description, str):
-            raise TypeError(f'Description must be string, not {type(description)}')
+            raise TypeError(f'Description must be {str}, not {type(description)}.')
 
         description = description.strip()
 
diff --git a/etiquette/photodb.py b/etiquette/photodb.py
index f61d8a3..c9c3128 100644
--- a/etiquette/photodb.py
+++ b/etiquette/photodb.py
@@ -1291,7 +1291,7 @@ class PDBUserMixin:
 
         elif isinstance(user_obj_or_id, objects.User):
             if user_obj_or_id.photodb != self:
-                raise ValueError('That user does not belong to this photodb')
+                raise ValueError('That user does not belong to this photodb.')
             author_id = user_obj_or_id.id
 
         elif isinstance(user_obj_or_id, str):
@@ -1299,7 +1299,7 @@ class PDBUserMixin:
             author_id = self.get_user(id=user_obj_or_id).id
 
         else:
-            raise TypeError(f'Unworkable type {type(user_obj_or_id)}')
+            raise TypeError(f'Unworkable type {type(user_obj_or_id)}.')
 
         return author_id