Generally I love every fish but the five I love most are:
1) Swordfish
2) Yellowfin Tuna
3) Salmon
4) Wahoo
5) Cobia
These five are for me personally the best fishes I have ever tasted. Unfortunately there are a lot of fishes out there which I have not tasted yet. So I guess this list will change over time. But for now these are the top five.