i read a bunch already mentioned, but there's also stand still stay silent (http://www.sssscomic.com/comic.php) which is post-apocalyptic friendship-and-monsters, and dumbing of age (http://www.dumbingofage.com/) which is... about college.

sakana (http://www.sakana-comic.com/) is also cute sol about people who work in a fish market and their adventures in trying to socialize.

the archipelago (http://thearchipelago.smackjeeves.com/comics/1891878/book-1-page-1/) has a special place in my heart because of just how long i kept up with it, and it ended recently, but as you can see the art really takes some time growing into its own.