I have not hired too many, but some of them are really great.
Derek Atlas: nice guy, great kisser and versatile. Pounding his muscle ass feels so amazing.
http://mensparkle.com/blog/tag/derek-atlas/
Angel Diablo: hired him a few years ago when I visited Vegas. Nice guy and great body.
http://mensparkle.com/blog/tag/angel-diablo/
Harrison from Seancody: hired him once in Vegas too. Super hot muscle jock. but he's limited to muscle worship only.
http://mensparkle.com/blog/tag/harrison/