|Mark Langereis Venture-Lieutenant, Netherlands—Utrecht aka Valiant|
The most legendary roleplayed Cleric of Asmodeus that stuck to my mind is the one Crispy roleplayed.
His cleric of Asmodeus is exactly what you'd not expect: A very friendly, happy and open person with a super-texas accent when he speaks. I remember quotes like:"Naaahh, don't you worry about the worshipping of Asmodeus. Nothing terrible about it! A little blood sacrifice here, a little ritual there and he's happy. If he's happy, then I'm happy. If I'm happy, you are happy. We are all happy!"
Or something like that. Crispy, the player himself, can of course describe him way better and more accurate then I just did. His roleplay just stuck to my memory even though it's been over a year that I had the priviledge to sit at the table he played his awesome Asmodean cleric.
So don't get stuck in a dogma. Play him/her the way you want to. It can be any way.