Swapping discs or mandatory installs? What's worse?

[Zkuq]

I prefer installs. They'll bother me only once and that's it. Well, there are a few terribly long install times as well but I wouldn't expect to see them too much.

MGS4-style installs are a different case though... I hate them. It'd be better to simply have more discs. It wasn't that bad when I first played the game but the problem comes when I have to install every time I start a new act (even if I had played it before). Still, MGS4 wouldn't be any good with too many discs either.