My taste is all over the board except rap. No rap, can't stand rap, but just a tad bit of old school hip-hop. My core collections depend on moods to fit the situation.
Trance/House/Dance
80's Hairband Rock/Alternative Rock/Lithium Rock/Classic Rock
New Wave/80's
Chamber Music Classical
Symphony Classical
Rat Pack
Like I said, my tastes are all over the board.
Living in the USA, they offer satellite radio, and years ago I bought a Sirus Sat Radio for the car. I'm hooked. Just about every genre under the sun.
I also like trying suggestions from others, give it a listen and see if it absorbs into my taste. That's how I became aware of a new favorite of mine, the "Chill" genre. A friend said, listen to this song Private Road by Bent. Gave it a listen, wow! Hooked!