CB but probably would've moved to S had I not chosen basketball over football in college. I was fast but not 4.4 fast. But I could play the ball extremely well and catch anything.
Also played RB but I was a speedy, shifty back so running between the tackles wasn't my forte...they liked to get me to the corner with off-tackle runs, pitches, sweeps, and my favorite, the flare pass in the flat. Put me one-on-one in the open field with a LB, DB, or DE and he was toast.
I remember in HS they called a pass out in the flat for me...the QB threw it WAY too high but I was able to gather myself, jump, and tip it to myself then break a tackle and take it 50 yds to the house. Holding penalty brought it back but we called the exact same play again. This time the defense was ready for it but the pass was good and I made two DBs look like idiots and took it to the house again...this time no flags. ahhh good times!
looking back, had I chosen football over basketball, I probably would've gone farther because there are more opportunities and basketball is probably one of, if not THE, toughest sports to make it to D-I in.
Of course, I probably missed out on a lot of injuries too...