I'm fine with Paizo sticking with 3.5 or going with a 3.75 or whatever incarnation they want to put out, as long as it still feels like D&D to me. I'll still buy their stuff for certain. If they switch to 4E, I'll have to seriously consider how useful it will be to me after I get to peruse the rules on the SRD, considering I don't have to sign up with a monthly fee just to check it out. I'd want to reserve a potential switch to 4E AFTER seeing some rules. Based on what I've seen so far (and it's rather limited) I'm not too excited about it.
I wasn't sure I was going to enjoy the switch from 2E to 3E. Turns out I loved it. I was of the opinion that AD&D and 2E was seriously broken though. There were so many wonky mechanics and judgement decisions on little things that should have been standard, that it was hard to run. D20 and 3rd Edition fixed almost all of this. Is it possible that I love 4E as well? Yes, it's possible. Is it likely that it so drastically changes the game as to make it flow and remain flexible, while still retaining the same feel that I'd grown to love that I will no longer see 3.5 as a viable game? I can't see it happening. It will really have to blow me away to make me a customer.
I'm not that thrilled about 4.0 from what I have seen, and granted it hasn't been much, but is that for my lack of looking? Not at all. When 3.0 came out, I was excited because I could see how things were going to work. It made me want to buy the new books and new adventures and give this whole D20 thing a try. It looked as if most of the non-rules issues had been covered, yet it was still the game that I had grown up with. Now, I have to create a Gleemax account, sign up for stuff, blah blah blah to get the information I need to make an informed decision. Maybe I'm not looking that hard. Hell, I don't even know what the cost for such things are because I can't be bothered with WoTC at the moment. I kind of feel like they've blown me off in a way, and I couldn't care less.
That's thanks to Paizo. I was really dissapointed with the cancellation of Dungeon and Dragon magazines. I haven't missed them much with the advent of Pathfinder and Game Mastery to be honest.
In a few words, if Paizo wants to publish in 3.5/3.whatever until they decide it's no longer feasible, I'll be here to the end. If they switch to 4E, I'll have to decide if the game fits what I like the most about it.
3.5 is still fresh to me, and it's all that I need to do what I want to do with the game. Am I clamoring for 4E? Not at all. If I check it out, it will be for free through whatever nefarious means at my disposal before I decide on making a single 4E purchase. It has to blow 3.5 out of the water, like 3E did to 2E, for me to consider switching over to 4E. If not, I'll use what is at my disposal to play for a long long time without even skipping a beat.
I can only hope for 2 things:
1) Paizo does well with whatever they decide to do. I'm really impressed with what they've done for the game, how they deal with their customers, and the high quality products they produce.
2) The game in the end still feels like D&D. I don't play much else, for a reason. It's what I like.
Thanks for asking Paizo.
Go Red Sox!