If they count, Cichla. they are large, ugly, boring, they all look the same, and I'm fed up of clicking on a post thinking its Crenicichla but reading it wrong.
I know a lot of guys on here love them so obviously They do have appeal just to me they never have and never will.
if cichla don't count then I suppose I would go with Barred Midas. It's a pointless fish.
Midas are bright and beautiful but their drawback is they are aggressive and tend to have to be kept alone, at least visitors will say "wow look at that is it marine? its so bright"
if you have a barred Midas its big aggressive and dull. makes it look like you just caught some kind of dull fish from a lake and shoved it in your tank lol.