Yes, and no. I like the same colors consistently (blues, purples, magentas and other jewel tones), but like others have said, what's in fashion can limit their supply in the stores. I love deep, rich brown, but haven't been able to find it easily lately. I am tempted by what's in fashion, too. Mint intrigued me, but just didn't work, although I gave it a small try since it was everywhere for awhile. Orange tempted me...but no, I didn't give in.
Sometimes, a new color will just fall into favor with me - not sure why, but I'm really into navy blue lately.