Oh boy, oh boy. Lemme just spend an hour searching for links for y'folks.
I enjoy all of these bands/artists.
The Wonder Years - Pop punk, while they're not particularly revolutionary, they create some of the most emotional music out there.
Owl City - Pop/Electronic music, he's one of those people you can just listen to the music of and feel happy. It's like listening to poems.
The Beatles - Classic pop rock (right? I don't know :P) If you don't know of the Beatles, you've lived under a rock.
Barely Alive - Electronic/House/Dubstep/Riot, He's one of the artists that got me really stuck in electronic music.
K100 - Drumstep/Chillstep, now... this guy makes most of his music royalty free, and it's really high quality.
Julian Smith - Er... comedy? He's just hilarious.
Jeff Williams - Rock, I believe. I've only listened to a few of his songs, but they really stuck.
There's also a few local artists I enjoy in the punk, pop punk and rock genres. (Coffee Creamer, booyah!) I'll go search for 'em later.