Hello Applied
There are a number of very good affiliate programs out there to choose from (there are also a load of stinkers) I would recommend you focus on three software platforms
Microgaming – Most microgaming operators are reliable and produce excellent returns for affiliates. Some are better then others in that respect due to creatives, bonus structure, number of games and retention programs. Choose your microgaming partners with that in mind.
OddsOn – Casino Coins and Magic Lamp are solid programs and generally produce good results if heavily promoted.
RTG – This is the most challanging of the choices. A good RTG casino produces excellent revenues. Unfortunately some of the operators have had a bad reputation among affiliates for performance and or stats. Choose carefully and I recommend you ask on the messages boards first for feedback on potential partners.
I hope this helps.