1. Slightly different view from many of the others . . . no question but that the Inner Harbor is touristy, but that atmosphere can also be fun! Not sure why you're going - if you're heading there as a "foodie" searching out the different, unique, and outstanding food in the area, then listen to the others. When we went, we hit some of those, but also spent two nights just wandering the Harbor, eating at touristy places (Legal, one other), and immersing ourselves in the experience (and having a lot of fun).
2. You must go to Obrecki's!, however. It is BOTH touristy and for locals! It is the best place around for crabs. Take a cab (while walkable, depending on day and timing it's not in the greatest area), order the largest crabs they have (believe me, the smaller/cheaper crabs aren't worth the money), and dig in! You'll get a hammer, a paring knife, a roll of paper towels, and butcher paper covering the table. A server will dump a dozen or two (or three or four) crabs on the table, and go for it. I don't care how gimmicky it may be, if you haven't done it it's a must eat for the area! Check out
http://www.obryckis.com!
One final note: around the far side of the Harbor is the American Visionary Art Museum (800 Key Highway,
http://www.avam.org) which has work by self-taught, psychotic, and/or compulsive artists (like a replica of the Lusitania of 194,000 toothpicks) - has to be one of the finest museums in the country (with a WONDERFUL museum shop). Also, the comic book museum is fascinating!