I was posting back on PlanetAD&D back in the day. I'd gotten frustrated with 2E and was mostly playing the likes of Vampire or just about any other RPG I could interest others in. When 3E was announced, I watched with great interest. Got the books as soon as they came out. All the other RPGs went back on the shelf to collect dust for a (long) while. However, I seem to recall that Sword & Sorcery's* Creature Collection came out before the MM did - one of the first 3rd party products I scooped up. I bought a ton of 3rd party product back then - ah, the days of having a well-paying job and no kids!
I lagged going to 3.5E - rebuying all the content all over again really ticked me off. When 4E came around, I went to Pathfinder instead as I was still so enamored with 3E.
Today, I doubt you could get me to play 3E - or only E6 if I did. The system's too dense and ripe for abuse by spellcasters.
* White Wolf's D&D printing brand