Depends on what you are planning to do at uni really? It'd be good to do something relevant to your course in some way, as it might boost your personal statement/application a bit...
I don't think Psychology is necessarily seen as rubbishy by universities, but I suppose that depends on what universities we're talking about, and what course we're talking about. Bare in mind that Psychology generally isn't as easy as a lot of people seem to think when taking it, it is interesting, though...
Good luck!