Thats a scary thought...one last fish and then quit fishing?! It would have to be something really big, like a sword, marlin or BFT over 500#s. So that would be on an 80W outfit. Oh, maybe a big halibut! I say that because I've never had a really big fish.
I can really enjoy most fishing. Favorites are
smallmouth bass on ultralite from a canoe
little tunny(aka false albacore,bonita) on ultralite,
livelining bunker to stripers on a 30# outfit,
chunking tuna on a 6/0 (if you've never had a 90# yellowfin run off while you're holding the rod in freespool and then click it in gear, you should rethink your last fish!)