ATI really started realizing and getting their driver problems together during the Radeon 8500 series back in 2001, that is really where they started to turn... then it really set off once the Catalyst program started, once they committed to that 1 a month WHQL driver release, things turned around for them
Oh, and my very first "gaming" card I purchased in 1997 with my own money was an ATI Xpert@Play Rage Pro PCI 4MB card (upgradeable to 8MB!, yes it had an upgrade module to make it 8MB if you wanted to). The reason why I chose it was because it had the best 2D quality you could get, besides Matrox, at the time, and had superb MPEG-1 playback performance and image quality plus the ability to do 32bit color in 2D AND 3D, which was unique back then. I teamed it up with a Diamond Monster Voodoo 2 12MB video card in 1998 and had simply the best 2D and best 3D performance you could get at the time, it was the BEST combo IMO, and when you wanted to game in 32bit color (Glide only supported 16bit color in 3D remember) the Xpert@Play allowed this, though its OGL drivers were NEVER good, but I made up for that with the Voodoo.
Before that combo I had only some crappy 2D (and no 3D capable) Cirrus Logic or something, I can't even remember, been so long. I went through several cards the next few years, even used an Intel i740, had to try out that brand new shiny AGP slot

I eventually replaced my Rage Pro + Voodoo 2 combo for an ATI Rage 128.