I've been a Ryu guy in the Ryu vs Ken battle, despite liking Ken more and more since he started becoming differentiated in III > IV > V. But...I think he's still second tier for me.
Oh yeah, and I can't afford him right now.
I regret all the characters I pass on because PCS nails them all. But I'm not a completist nor am I wealthy. And I like to make my lists and stick to them...and Ken hasn't been on it.