I have always enjoyed going to Plymouth and I try to go as often as I can. The city boasts nature reserves, parks and golf courses, so there is plenty to do if you are the outdoor-sy type like me. The people are really friendly and my fiancee and I have been traveling to Plymouth since the beginning of 2009. We even had our first weekend trip there.
If you are in town you must visit the Clifton E. French Regional Park, we had a great time walking around - we even saw a deer! Plymouth has a great church, Basilica of St. Mary, which took 20 years to build, and when you step inside... its breath taking.
The Three Rivers Park District in the city of Plymouth has everything from parks, trails, kayaking and a great garden. It really is a beautiful place where nature is shown at is best. The people are really sweet and will help you with anything you need. The small town feel is something to be cherished.
If you like plays then visit the playhouse on Annapolis, they always have a show Wednesday - Sunday. With great small budget community plays and even some big budget plays every once in a while. The golf courses are so beautiful, even if you don't golf you will have fun there.
I love going to Plymouth, MN, it is a delight at all times, seasons, and hours of the day.