Cafe Apropo is a nice, comfortable little coffeehouse for the OSU area. Relatively new, its nestled in the heart of Victorian Village. The staff is very friendly and funny, and the drinks are wonderful as well.
I recommend you try the Buckeye latte...chocolate, coffee and peanut butter - you can't get any better than that! Local students like the place as well because if its WiFi access...local wine afficianados like it because it has an entire section devoted to wine.
A good place to go on a first date or just with friends, Cafe Apropos is a warm, friendly coffeshop that the community (and I) really enjoy.