I used to always use auto in every game, including GT1, 2, Colin Mcrae, and Need For Speed. I tried manual a few times but couldn't get the hang of it and always couldn't really figure out how to make it work well. However, when I picked up GT4, I hadn't played any racing games for a few months, and for some reason I just felt the urge to use manual even though I've never really used it before and I've never driven a manual car. But I actually got the hang of it pretty quickly. After doing the B and A license, I'd say I was as good as any other person at it (in the game, of course.)
I'd say it's a lot more fun to do manual in GT4. I mean, obviously the game is not centered on pure speed, or a lot of action. The point of the game is technical driving, and when you're going around in an automatic it just takes that element out of the game. If you've using just a normal controller like me, all you're left with is holding the X button to go and pressing square to stop. Not extremely exciting if you ask me. On the subject of manual being faster than automatic, in the game it's not really true. In real life it's true, but the game's automatic shifting is pretty much the same as manual except it shifts for you. It doesn't really have many flaws and almost always puts you in the best gear, so I don't think it's really a time disadvantage. Just detracts from the experience.
I'd say it's a lot more fun to do manual in GT4. I mean, obviously the game is not centered on pure speed, or a lot of action. The point of the game is technical driving, and when you're going around in an automatic it just takes that element out of the game. If you've using just a normal controller like me, all you're left with is holding the X button to go and pressing square to stop. Not extremely exciting if you ask me. On the subject of manual being faster than automatic, in the game it's not really true. In real life it's true, but the game's automatic shifting is pretty much the same as manual except it shifts for you. It doesn't really have many flaws and almost always puts you in the best gear, so I don't think it's really a time disadvantage. Just detracts from the experience.