I breathed a huge sigh of relief when I found out that HIMYM will have a 4th Season at least. Not that the show is an all-time-great one. It's just that each episode has it's Barney moments. Just for that and maybe a bit of Robin, I'd like the show to carry on. It's way better than some of the other crap on offer in the name of comedy, like 8 Simple Rules et all.
There's also the good camradrie between the friends in the show, it's a light hearted romantic comedy which is always saved by Barney from becoming cheesy!