I would literally die and go to heaven if I had several ponds to manage and fish that I could experiment with. There are several species I'd like to (try) grow to abnormal sizes just because. 2 species I'd try if I had the ponds to "waste" are longear sunfish and spotted bass.

Bass/catfish/bluegill is somewhat boring. Heck, I can just go fish public water for those almost anywhere in my area.