I've been known to watch Let's Plays from time to time. I'm mostly interested in the personalities of the players as opposed to the games (although having a game I love definitely helps). A selection of some of my favorites is as follows:

The Achievement Hunters: These are a bunch of guys from Rooster Teeth, aka the guys behind Red vs. Blue and RWBY. They're probably most known on the Internet for their Minecraft and GTA videos, but they cover plenty of other titles. Their Rainbow Six videos are particularly amusing.

BurningDogFace: He covers a lot of videos, has a nice laid-back attitude, and doesn't get nearly enough views. He also gets a special mention as being the first LPer I ever watched, back when I was just a wee sprog.

Jesse Cox: What I like most about Jesse is his attitude. He's got a good laugh and he clearly loves games. His meltdowns can also be fun to watch at times.

Super Best Friends: Formerly Two Best Friends. It's all about the interplay between the four members. I'm not a fan of several of the big titles they've covered, but their banter is so good I don't care.

I feel I should also plug myself here. While I do primarily iOS game and application reviews, I also have a few LPs in the works. I've fallen a bit behind on them due to technical issues and Real Life demands, but I'm still working on them.

Well, let's see. I like:

- Markiplier (one of the few "screaming" let's players I like. You know the type. He is just so sincere with his fans, I have to admire him for that.)

- Gopher (One of the best role-playing personalities I have seen. He also has an amazing accent. I would recomend his Lets Play Skyrim Again or his Fallout New Vegas videos. Warning, however. He is a modder, he makes and uses a lot of mods for most of his games. If you like vanilla content, he is not for you.)

- Jesse Cox (Dude is close to the screaming type, but is more the super-freaking-silly type. Plus, he's on the Co Optional Podcast. I have to like him for that at least!)

- The Sw1tcher, otherwise known as Two Best Friends Play! (Like Game Grumps, but funnier, and usually more interesting.)

- Yogscast, specifically Duncan, Sips and Sjin.

Outside of Let's Play, I also follow TotalBiscut and Angry Joe for reviews and opinions. Boggie2988 is also good, though I have not been watching him as much recently.

Guys I used to watch:

- Tobuscus (I, too, was once 14.)

- Yogscast, Lewis and Simon (I don't hate them, but I don't love them as much as I used to. I would much rather watch Sips then the main two.)

- Game Grumps (No, not because Jon left. I just found myself overall bored while watching. Do I watch highlights of them? Yes. But I don't really watch all too much of them outside.)

-PewDie-- Nope, stopping right there. Only playthrough I liked with this guy was Last of Us, and that is because he shut up and played the freaking game. He was not screaming as much, not being near as abnoxious as usual. If you like Pewds, fine. But I can't sit through almost anything he does.

I love Helloween4545 (seriously some of the funniest horror-survival based Let's Plays I've ever come across), not to mention the Yogscast (Hannah and Rythian especially) and the guys over at Achievement Hunter.

I watch a lot of Scykoh, both his Let's Plays and stuff like Glichfest

It's not technically a lets play but it is very similar to one. Does anyone else watch the Mindcrack UHC? I always enjoy watching Sethbling and Docm77.

I don't watch that many, to be honest, but I really like Marbozir. His Long War LP was fantastic, but his Civ V content is just wonderful - and he plays as modded Civs too! He's even got CL's Australia in his current game as the Cree, which boosted my ego a bit. =]

I know PinkKittyRose! I'm subscribed to her! I don't watch her videos very often, but still counts, yeah?
I found Kitty through Raocow, whose videos I watch almost every day. I watch Nerd³ and Cry about that much too. Dan is hilarious and Cry gets so immersed in the games he plays that it's hard not to enjoy watching him.

Markiplier: I'm fairly certain he's the reason for the explosive popularity of Five Nights at Freddy's.

PinkKittyRose: A somewhat unique Let's Player, her commentary is usually given through subtitles, as she prefers to let the game's audio speak for itself. She mostly does challenge runs of classic or classic-style games.

RoahmMythril: Also does challenge runs. His main attraction is the Perfect Run series, where he plays through the classic Mega Man series, while taking no damage and using only the basic weapon. Uniquely for a challenge runner, he shows his failed runs to give you an actual idea of the game's difficulty.

I like Chuggaaconroy (and TRG, of course) and The LobsCast best :)

I watch Etho and Cubulous for their Minecraft stuff, WarOwl for some good ol' CS:GO casting, and Husky for anything StarCraft related.

Never heard of those guys. I watch The Mighty Jingles' videos from time to time. They amuse me.

I haven't heard of any of those, but I'm a fan of TheSilverKetchup's Let's Play Harry Potter and the Sorcerer's Stone for the PC. Tetrus with the Flipendo blocks? Calling CPS to get rid of the gnomes? Catching the Snitch in less than two seconds? Yes please!