Well, I've been dreaming a lot about Mambas recently for unknown reasons so maybe them.

But nah, the list of ones I like just because I think they look cool;
- Gaboon Viper
- Yellow-bellied Sea Snake
- Electric Blue Malaysian Coral Snake
- European Adder
- Mangshan Pitviper

And I think if I ever were to actually consider getting something front fanged venomous, I'd be very inclined to got with a Pigmy Rattler because they're just cute as a button.