I'm using a TE setup simply because hooking it into a sorting system is dead simple, and because I've made IC2 setups since at least 1.2.5 (I don't remember exactly).
The thing with BC power though is you've only got one of a few ways to do it (I'm going to discount the Electrical Engine, since you should really only ever use it if you've got an IC2 setup, and need a little BC power). You've got solid fuels, and you've got liquid fuels. In any case, you need to burn something, and create fuel to burn (if you want a stable BC power system, anyway. You could mine coal for days... but why?). Whereas IC2 gives you some pretty interesting options, like a Watermill-redpower system, for example. Or a nuclear reactor. Sure boilers are fun, but there are only a couple of ways you can set one up. You can come up with all kinds of crazy stuff with IC2. I mean, if you're into the potential engineering challenge of FTB, like I am.