i have to admit that i just admire well done graffiti in general. banksy is the only artist whose work i’d be able to point out.
i don’t live in an area where there is graffiti (at least, graffiti that isn’t just shitty tagging), so i basically just browse through books of graffiti art, and like ‘em as i see ‘em.
i’m going to look up the folks you’ve mentioned though. i’m pretty sure i’ve heard of espo.

edit: i just googled espo, and i am familiar with some of espo’s work! pretty cool.