I also do it! I love it! I have found some old homesteads around here, and was able to find an old stove, an old horseshoe and an old toy cap gun. I tried at my mother in laws and we found an old sprinkler system buried about 3 inches down LOL! And of course I have found some coins and stuff, but none older than the 50's.
You will enjoy it! Just make sure you bring a small shovel, a bigger one, a baggie, plastic sack and probably a backpack. I have read that the best places to go are parks because people drop stuff all the time.