Well species easy to customise are usually popular. Like kacheeks. I just like the look on their face. Aishas are easy to cloth and well. Catpeople. I am catperson but still I morphed my aisha (made it to baby moehog
Blumaroos. I have name for them, but I am sure the term would be caught by Dave's filters in comments
There is only species only that I simply think it's disgusting and it's quiggle. And my hubby decided to make quiggle. He adores his quiggle. (old quiggles were fine, they were happy. Current just looks like it wants to punch you in the face).I used to dislike converted eles but I've started to be fond of them again.
Tonus are just pain in the... yeah to customise. I dont' really customise mine, since I have maraquan but they, esp basic yellow, has very special place in my heart.