Alpacas and Llamas are cool (alpacas are cooler though)
Llamas have better personalities (generally). Alpacas are about as smart as a bag of hammers, not that they're much smarter. Anyone in my area who has the space and thinks llamas are cool, I'll sell you one for $200, and throw in a 2nd one for free.
edit: also, the only llamas that spit at people (intentionally) are llamas that haven't been raised correctly. (Well, except at shearing time. They hate that. They turn into perpetual spit machines, regurgitating everything from their stomach and spitting it out - at least the way I shear them, which involves a block and tackle, some ropes around their legs, and stretching them out so that they're laying on the ground and can't move except for their head/neck. Unfortunately (for me), I hold the head to prevent them from injuring themselves; and that means I'm ground zero for spit. Then the flies are attracted to the spit. It sucks.)