Here's my take on the designers
Roguey mentions as being "peak Obsidian", excluding Chris Avellone.
What they weren't: Uniformly as good as Chris Avellone. There's this idea floating around that there was this golden age where Obsidian was brimming with Avellone-tier writers capable of pumping out MotB masterpiece after masterpiece. I think that's a myth.
What they were: Representatives of a generation that was generally closer to the RPG Codex's cultural and artistic sensibilities/influences than Obsidian's current crop of writers.
As for Avellone himself, he's so suis generis that there's not a lot to meaningfully discuss.