I watch Let's Play by TheRadBrad on occasion if I want to see a popular AAA game let's play like for a Call of Duty or whatever type game. He did cover Terminator Resistance though which was very neat since he usually only covers really popular games.
The main lets player I watch though it's still game dependent is ChristopherOdd. Originally I was looking for Dark Souls walkthroughs but he plays a lot of games I like to play, such as RPGs and fantasy games and am too wussy to play like roguelikes and horror games.
For indie games I like to watch Splattercat Gaming. Usually he covers a game for an hour or less and then maybe revisits it again after awhile to see how it's progressed in development or with new content etc. I like him and he's given a few reviews that got me to actually buy a game. Like WarPips.
Every other gaming content creator I follow to any real degree tend to be for particular games or genres or do stuff like reviews, commentary and/or lore videos.