I like (prepare for a long list):

Rap/HipHop: mostly mid 90s East Coast stuff, from the days when I was young
SxE Hardcore and Hardcore: Earth Crisis, Ignite, Snapcase, Slapshot, Gorilla Biscuits, Youth of today, Shelter etc.
Emo: Boy sets fire, Texas is the reason etc.
Ska: I love the mid 80s bands from the UK and some of the rocksteady old school stuff from jamaica
Indie music
Electro and Breakbeats
60s Psychedlic stuff
Northern Soul