Iraqveteran8888 is a good one, a gun store setting. Very informative, how-to's, torture tests, some reviews, "gun gripes" and I really enjoy watching Eric and Barry.
TheYankeeMarshal is funny as all hell and is a mix of reviews, politics and random firearm related videos. He seems to know a lot about firearms and is very down to earth, lots of good common sense on political issues.
Sootch00 is mostly gun/gear reviews, a good natured family guy attitude.
Nutnfancy is all about tactical stuff... Almost to an extreme. I can only handle his 30min long videos in small doses.
We must always fear evil men, but there is another kind of evil that we must fear the most... And that is the indifference of good men!