I think slowplaying the big pairs has a lot to do with your table image and what type of players you're up against. Is the BB aggressive? Does he want to push you around? Are you an aggressive tight player that always raises or folds? In general, the more aggressive I've been, the less likely i am to slowplay a big pair, it will look fishy. And conversely, the weaker I appear, the more likely I will limp from the SB with the big pairs.

Also, i think there can be situations OOTM that call for slowplaying. It's trickier and, of course, a lot more risky. but sometimes on the bubble you gotta let the big stack push you (the smaller stack) around in hopes of doubling up.
good luck