While BG2 and Planescape are excellent games and Planescape certainly in my top 3 favorites evar, they never felt properly turn-based to me. Technically I know you can make it autopause at the end of a round, but the reason they always felt less turn-based to me than something like fallout is because you click to specify movement and the distance you can move is some continuous movement rate over time thing. You can estimate pretty accurately how far your guy can move in a round, but I never know exactly, whereas the kinds of games I see as being "real" turn based measure movement in discrete # of steps (e.g. fallout, spiderweb games).
Every profession produces its own best.