My first time clipless was hilarious. I was riding my mtn. bike and slipped on some tree roots and fell over. I was head down on a steep slope and I couldn't unclip; I had the tension WAY too high. I had to wait for another rider to come up and help me. She got my feet loose and after she finished giggling, she admitted the same had happened to her years ago.
Spinning a high cadence on flats seems like a recipe for disaster; especially in wet weather. Climbing double digit grades on flats doesn't seem like a good idea, either.
Perhaps if the OP were to try riding a track bike, he might like clipless pedals.
(please don't ride fixed gear bikes without foot retention!)