on my campus: I wouldn't have joined another. There is only one other national here, and I wouldn't have been happy there and the locals on my campus are another story. a lot of the local groups here are in it just for the 'letters'. we have 6 local sororities on campus. one local even put up a mirror in the quad with their letters and a sign that said: 'You'll look so good in our letters'
(there are a few that are the types of groups that do nothing but party. they attend no community service, have no chapter philanthropy, poor participation at greek events, etc.) But some here are really good, just not my home.
Nationally I could see myself in DZ, Chi O, or KKG