I've tried a lot of the so-called undesirables, most are okay, some are pretty good and a few are great.
Some really depend on cooking method and seasoning as to their eating quality, can be poor one way and good another.
Hardhead, poor, no thank you.
Hardtail, okay, but I don't keep them.
Sailcat, good, my family loves them.
Pinfish, good, but hard to find one big enough to worthwhile.
BoBo, good, makes an acceptable sashimi or ruby rare
Blues, very good, I keep all I can, prefer them 10"+.
Gar, very good, break out the tin snips for easy cleaning.
Lookdown, excellent, at least 12" to be worthwhile.
Spades, excellent, comparable to Flounder.