I for one prefer normal girls instead of shy ones. Just because your not shy doesn't mean your loud there is a inbetween. I think it's mostly people on here that say they prefer shy girls because alot of people on here are shy themselves. I would much rather prefer a confident girl.
"Empty tin cans make the most noise" - Not sure who originally said it but I heard it from my Dad. I am reserved and quite shy and I am often overlooked. But at least I'm not getting attention for all of the wrong reasons like some girls do.
boys offline prefer loud girls because they're easier to get with and don't require much effort to get to know them.
boys online prefer shy girls because they're less likely to reject them and, if they do, it'll be quiety and save them embarassment and most of them are shy themselves so they find shy girls less intimidating.
i know it's generalisation, but it's true for the majority.