I do psychology, it's great! I'm doing AQA AS at the moment and we're doing:
Attachments (like how babies attach to their parents, and about daycae and stuff)
Cognitive (memory, forgetting, and stuff about eyewitness testimony)
Abnormality (Im doing this at the moment, it's really interesting. We do stuff like how you define abnormality, and stuff about easting disorders)
Theres also units on stress, conforming and research methods, but I havent started that yet.
I wouldnt say psy is a doss subject, you do need to know things and no-one would be able to go into the exam and pass just on common-knowlege (and i mean no-one). Having said that though, if you know your stuff it's easy enough. I'm hoping for an A in it. It's really enjoyable as well!
Hope this helps