your musical tastes can also affect the amount of initial effort you have to put forth in order to satisfy your desires, but you can't go wrong with the blues/folk route. i am a player of extremely varied stylistic backgrounds, but what got me wanting to play guitar was punk and ska, all the while pushing my lead playing abilities. i got a good mix of barre chords, scales, speed riffs, and melodic experimentation. others who might come from a more genre-specific standpoint (ie, "i want to play metal guitar") might have a harder time building confidence in their abilities because they are shooting for a higher standard of playing ability. all you have to do is remember that realistic expectations are your best friend, and realize that it might be years before you can play alot of the things you want to. start small and build yourself up.