I currently have a 15" MBP that I bought in 2012, but I think it's time to get something smaller and lighter. I mainly use my laptop for college (so excel, word, powerpoint, etc) and for leisure. I would like to start using photoshop, but it'd be as a hobby. Right now I'm looking at the 13" rMBP, 13" MBA, and 12" rMB. The 12" MB is intriguing, but I've read that it isn't terribly impressive. What do you guys think? Also, I didn't see a generic Macbook forum so I hope this is okay.