Alright - Fine. Let me just grab all of the old discs, install the games and tell you exactly which ones have the browser and which do not. And then we'll see if "tradition, son" still holds.
Tradition isn't an excuse though - With the massive libraries of custom portraits, a simple "left, right" click option is not acceptable at all. Imagine for a second having to manually click through a few hundred portraits - Then going back a step to make sure they match up to the character model...and then having to click through them again.
Edit: Actually I'll do you one better. https://www.youtube.com/watch?v=-vf5Tzx8wC4
There - that's Icewind Dale 1 with a portrait browser. So that makes Three out of four IE games that had a portrait browser. Tradition, sonny!