He looks like he is wearing greasy paper bags on his legs.
I have a swissgear backpack that I use on a daily basis as it is comfortable and has quite a bit of space (including a dedicated laptop pouch). However, it is really not the best looking bag, so style wise you might want to look elsewhere.
Also, personally I would prefer a messenger bag for college, as it just looks a bit more relaxed (as well as being plenty more comfortable), and slightly more mature. A nice leather one would serve you well.