The reason the comics are so funny and so popular would be the character Richard. He's an undead warlock who likes to kill things. In fact, about the only thing he does is kill, although in humerous and witty manners. I generally end up skipping most the dialogue to find Richard's black and red speech bubbles, here's a little taste of the comics:

This is one of the cleanest comics, the more offensive ones get to be downright hilarious. (Offensive in language/blood and gore that is)
If that's your kinda humor (honestly, who didnt at least chuckle?) then I'd suggest checking out their website, you can read ALL the comics for free. God knows I did. Dont worry, it's not just all mindless violence and confusing plots, there's some moments where it's deeper then just "Haha I killed joo" Oh, and you might wanna start from comic one, cause the actual story will get confusing otherwise. Have fun. Try not to read them all in one sitting. http://www.lfgcomic.com/