I have a 85/2 and two 105/2.5's (one with inbuilt hood, and one without)

the 85/2 gets a bad rap sometimes but it seems sharp enough for me (in the same league as the 105) when stopped down a little (f4 - f5.6)

If you're working inside, the amount of room you have versus how much of the person you want to capture (headshot, upper boddy) and how close you are comfortable working all weigh into which one to pick. IMO of course!