Personally I would prefer Chaosmen.

Out of those 3, in term of hotness of the model - Solo scene

1. GH
2. SC
3. CF

BJ Scene rating

1. CF
2. SC

Sex scene rating

1. CF
2. SC sex scenes are too vanilla and after 3-4 videos I'll get bored. hahahah
3. GH is the worst in term of sex scene or bj.  Granted they are straight models, but dont make it look like it was forced… such a turn off.

Transformers.. all of them

Ideal size for bj is 5-7
For bottom is 6-8. too big or too small would be painful.
The girth counts as well…