My first rockband guitar broke in less than 2 weeks, even though most of that time I spent either drumming or playing with my GH guitar. I would definitely disagree with "I swear if you use it and give it a chance you'll love it" statement.. I'd modify that to say "if you use it and give it a chance you'll get used to it." I do get used to it when I play with it for a while and I think I can play pretty much equally well with either guitar but given the choice I definitely prefer the GH3 Les Paul. But I understand the reasons people give for liking the Strat, they just don't apply to me personally. I like the clickiness and the smaller size of the LP doesn't bother me. Also a RB guitar fans say they can slide easier with the flat buttons as opposed to the raised buttons. I like the flat buttons for the more realistic look but it's actually easier to slide IMHO with the raised buttons because it's easy to feel where my fingers are and know when to stop moving my hand when I'm sliding. When I start playing with the Strat I have a tendancy to over slide and get my fingers off of where they are supposed to be on the buttons. Like I said though, I don't hate the rockband guitar and if I play with for a few songs I do get used to it... but I still prefer the LP.
edit: also, while I started this post saying that my strat broke within 2 weeks of very light use, I should point out that I've had the replacement for a while now and it hasn't broken again (though I do use the GH guitar a lot more than the RB guitar) and from what I've read the newer RB guitars have been more reliable than the release guitars were.