I know you are a perfectionist by heart. Sometimes it might be better to 'move on' whenever you feel the urge that some tile or other aspect didn't came out the exact way you were striving for. Eventually, you'll improve along the way.

Take for example Blade. His tilesets reflect his skill development all the way from Aztec to Fortress of Forgotten Souls. Yet all of them are usable and have spawned some good levels. I'm thankful he released stuff without trying to be Agama first.

I hope to release a tileset this month, probably a mediocre yet usable one. I finished another one that's less usable, made for one specific level that's not done yet. Most tilesets are only used by the original author anyway.

Point is that I get to release these tilesets because I got to surpress my urge to try and perfect them with my limited drawing skills. But perhaps I'd better stop talking before anything is released. xD