My favorites would have to be David from Castle Affiliates, Elliott from Focal Click, Nir from Aff Europe, Myron from Red Flush, Renee from Rewards Affiliates, Inbal from Casino.com, Martyn from Affiliate Edge and Lance from Referback.
I have probably forgotten quite a few but those are the first ones that come to mind, simply because they treat me like a partner and always respond to my emails and pay me on time – the 3 most important things in my book