Good question haha....
Just your question is enough, no need to answer.
yeah, me too, not addictive but I also have a big closet.
I go shopping just for fun, hopping that new beautiful clothes will make me cheer up, blow away some kind of sadness inside me. Many times, it doesn't help or it helps just a little bit.
After a hard working week at office and also housework, shopping is something to relax.
Sometimes I really need to have new clothes for events, sometimes I want to buy something to be creative, to play mix and match with the thing I already have, just follow the urge to create, to be me.