I (26, male) watched quiet a lot of "Let's Play"-ers and the one I can immediately think of go as follows:
Pewdiepie - can absolutely not stand him. I hate his fanbase. He is just silly and immature for my taste. I can't stand his type of "humor". To me he is just a clown infront of a webcam. (Flame me go ahead.)
Toby - I was actually subscribed to him for a long time. But he turned more and more into not playing for fun but only money. He stopped some Playthroughs in the middle of the game because they weren't netting enough views, that's when I quit watching him, also he tries to put on a lot of show and for a game like TWD he is too hyperactive, constantly talking too much which imho takes away from the experience of the game itself
Nova - Pretty cool guy. I like his style somewhat. But he is a bit slow on uploads. That's why I don't subscribe. No point in watching 1-2 videos and then having to swap to another Uploader or wait for days or even weeks.
Hannah (Yogscast) - I love british accents. Big plus. But like Nova she is slow on uploads so yea.
Tetraninja - He seems to pop up a lot when looking for walking dead videos. Watched his first 2 episodes, he seems to not pay much attention and often annoys me when he doesn't catch obvious story plots. Personally seems too unobserving/unintellint to enjoy.
DanQ8000 One of the guys I found when searching for Walking Dead Let's plays. He seemed like a genuine guy, actually paid attention to the story, often times reacted the same as me and importantly uploaded superfast so I could see the entire episode in one go right after release. So yea this guy currently is my choice.