Well,
A lot of them, display useless information, like filename, filesize etc, some don't display captions, some arent easily editable (at least not for newbies), some aren't documented properly, some have too many features, like for example some don't allow anyone but admin to post images, some require things on the webserver that it may not have etc, like imagemagik etc.
I want something simple, like the following;
When you view the gallery at the top there is the gallery name, underneath a description, under that tables for each thumb with caption underneath, clicking said caption will take you to the larger version in a table with a comments system underneath, this should display latest 10 comments (fields should be name, email, comment) with numbered pages for past comments.
Users when they upload will have the following form fields;
Name, Email, Photo (Browse), Caption.
Although I would prefer the design not being set, like there should be html templates which I can insert the variables to put the components of the gallery in.
Get the idea?