I love comics and weird RPGs. If you love either/or, here are some very unique ones you have to read or play, hyperlinked to as good a starting place as I can find. These are all obscure: give yourself a point for having heard of one, or three points for having read it/studied the manual.
0-1: Not very geeky, man.
2-4: Big geek.
5-8: Top notch indie nerd.
9-15: You already heard about these in person from me.
16+: There is no 16+.
All of these have very unique elements to them, so in addition to being fun, I think they are very good to learn from.