With defensive transition, do you run back to spots on the floor (paint, wing) or sprint to players?

One waiting at opposite NBA 3 point line. Sprint to lane and matchup

In transition defense i would go with spots protect rim, stop ball and then as everyone gets back match up when appropriate if youre going man to man 

Protect Rim...Mid-line right above 3pt line...Slow ball down

Sprint to the rim then pick up. Rim is priority #1. Where else would they be going?

We sprint back then pick up a man.  If the opponent is playing fast we will pick up the closest man then switch to a better size matchup when possible.  If the opponent is not pushing the ball we will pick up our assigned man while picking up the ball at halfcourt.