I'm glad I went to Venice so I don't have to go back. Everyone there was very friendly, don't get me wrong, but it was so crowded that it took away from the experience. There wasn't anything particularly spectacular about the place. Definitely recommend going to St. Mark's Basilica and grabbing a snack at one of the cute restaurants on the square. We also enjoyed walking the "back streets" that weren't on the main streets. It just seemed a bit overrated, in my opinion.
Insider Tip:Don't try and walk these streets with your luggage unless you are staying within 5-10 minutes walk from the train station.