I have periods of intense interest, usually when I am on central campus or the U-M medical campus, where there are tons of Pokestops.
Around my office, a block from the Big House, there are only two stops and not a lot of rare sightings. There are actually a number of Pokestops inside Michigan Stadium, but it's only open to the public during events, so it's not exactly a lunch hour walk.
So I haven't actually opened it for a couple of days. I just hit Level 14 a couple days ago by doing the start-a-lucky-egg-spend-half-an-hour-evolving-a-bunch-of-your-creatures thing. I also try to remember to open it when I know I will be walking for a bit, to try to hatch some of the found eggs.
But most of mine are still too weak to take on anything at the gyms around here, so I haven't really battled yet. I have, like, a zillion potions and a dozen Pokeballs.