I still run 3.0 and still despise 3.5.
Nonetheless, I'm currently stuck playing in three 3.5 games (intermittently, none are particularly regular) of which two were originally 3.0 before converting, and I'm currently substitute-DMing a 3.5 game while the DM is busy with stuff IRL......
I don't plan to start any 3.5 games though, not for quite some time at least (a year, 2, 3, maybe more......), since I don't plan to waste my money on 3.5 dung until there's some exceedingly drastic improvement in the quality and interest of the 3.5 products. Sufficient to
not make me
personally convert all my hard-bought 3.0 book material just to be able to use it. Besides, I hate most of the 3.5 changes (not enough of it was merely useful balance-oriented or playability-oriented change).
I still have many, many more 3.0 campaigns planned and I still hope to find a group who's willing to run 3.0 games so I can actually
play using my hard-bought 3.0 materials.
I might, just possibly, convert to occasionally running/playing 3.5 when/if (and it's a big if) Wizards of the Coast finally gives in and produces a true conversion of 3.0 Oriental Adventures that is actually playable and complete, not some partial-Rokugan-partial-miscellany patchwork collection that has no guides for making it work or mesh together or function as a campaign. I want information for Kara-Tur or something, that I can use hengeyokai and vanara and spiritfolk and such in, and wu jen and shamans and sohei, and kappa and hopping vampires and tasloi, and dhenuka and leather scale and chahar-aina. I want an Oriental Adventures 3.5 book that actually provides the foundations for a campaign, and incorporates everything in the book (or at least a few well-developed campaign models like in D20 Modern, that altogether allow everything in the book to be used at least separated into 2 or more different campaign mini-settings). I want to see more and better attention paid to martial arts and oriental gear, rather than making so many of the oriental weapons Exotic for no good reason, and rather than making martial arts so minimal and bland (what happened to the cool stuff they had back in products like the 2E Complete Book of Ninja (or was it the Complete Ninja's Handbook?)), and rather than making so much of the oriental gear both unrealistic and weak (how come most samurai armor isn't accurately portrayed as being made of lacquered leather plates and such, for instance, and how come much of the oriental armors and such are weaker than the core ones overall?). Rokugan is far too limited for use with most OA material, and has no means of incorporating all of it reasonably (I should know, I spent a year or two trying with my first OA campaign).
It's bad enough that Wizards of the Coast had to go screw up the psionics system in 3.5 instead of simply fixing and streamlining it (but nooooo, of course they couldn't do that, they had to mess things up with augmentations, some stupid new "crystal-punk" sort of theme as I've heard it called on these forums, and such stupidities as soulknives and wilders as 20-level classes, and the idiocy of psionic focus making psionic feats actually pretty worthless, and making psionics just more akin to magic by giving them all sorts of magic-like powers and abilities that no longer make sense in the longstanding D&D psionic flavor). So I haven't bought the XPH yet nor any other 3.5 crud. Maybe someday I'll waste my money on it for the sake of scrounging the few marginally-worthwhile ideas and fixes in it, but I doubt I'll waste my time and money on such bull.
/end rant