To be brutally honest, very few RP corps of the moment interest me. Then again, when I was making my short list of corps to join (including non RP groups) when I came back to the game, I found the short list to be very short indeed. So it may not be a "problem" exclusive to the RP side of things, but there definitely seems to be a lack of strongly branded groups with cool identities who also match all that with actual effectiveness. Not saying there aren't a few out there (because there are), but there seems to be largely two types of groups out there: generic and those afflicted with Goon-like-behaviour-syndrome.
I do have a slight curiosity regarding the major movers on either side of the Amarr-Minmatar conflict though, such as PIE, UK, EM, et al. They are all age old monoliths with long pedigree, though.