Nothing bad about trying out the alternative to find out how it works, but is there really some kind of intrinsic value in rooting for the underdog - especially when this underdog is Microsoft? Not to say that Google isn't big (and eeeevil), but MS definitely *is* big (and eeeevil), not just that much in search tech. Same goes for anti-iPod pro-Zune fanboys.
I also don't think being against the grain for the sake of being against the grain is quite honest intellectually. I hope if you find Bing more useful than Google, you end up preferring it because of that, not because of being different from the percieved mainstream.