This of course isn't a germ-free environment which will yield untainted results, but I'm throwing this out there anyway.
Results could possibly be skewed... you could argue anyone involved in a game's forum this far out from release is going to be your more hardcoe player. Still, I'm curious. Be honest.
In Oblivion I run 203 mods, right now, with several of those being merged for compatibility purposes, and have used (but no longer) probably twice that. In Morrowind, I use about 60 mods. Several of the mods I use are my own (for either game) and most of the mods I use I have further tinkered with to suit myself.
Yeah, I'll be modding and using mods in Skyrim too