probarbly an arowana or aligator gar , i have had in the past a channa micropeltes whivh are cool when they eat but boriiiiing when they arent , i also like rope fish and bichirs
Tied for 1st: Tigrinus Catfish, RTG arowana, any FW ray, schools of Tetras in nice planted tanks, Stable Datnoids (minus AT's and NGT's)
2nd place: any other arowana, AAA flowerhorns,