I have a couple of mates that are big into 40K - I myself love reading the books, I love the Dawn of War Series (and I quite enjoyed Space Marine) but at $40 a model for special characters, not to mention the 200-300 you have to spend to get a single decent Army and also the hours of invested time I don't have.
I stear clear of the tabletop hobby.
Mainly because I know I would enjoy it and it would make that little bit of my social life and bank account balance I still retain that little bit smaller