My alltime favorite, actually, is
Naka TeleeliA guy who is working at indie game designing himself, there's several reasons I like his LPing.
1. Laid back. He says everything so deliberately and smoothly and with such emotion that it's so interesting.
2. Informative. He does his research, as is shown with his Okami let's play. It's not just an entertaining watch, it's also educational!
3. ElementalOgre. A real life friend of his that, when he's around, brings out Naka's more humorous side, as they make several riffs at each other.
4. He is a fan of excellent anime, such as Fist of the North Star, is a bit of a Japanophile (self-admitted, I do believe) and yet doesn't shove it down your throat except with a few of the references he makes. (WA-TAAAAAAAH!). He is also a lover of everything MANLY. In a totally non-gay way.
5. His main character for his video game that he's developing is female, and when given the opportunity to, he will play as a female. Many of his favorite video game characters are female. Have I mentioned his definition of MANLY is actually gender-neutral?
6. He's not arrogant. He's, in fact, very supportive of upcoming LPers. And he's willing to admit when he's wrong about a game.