I agree with nearly everyone and even more so with Roarmeister. The shorter the blade, the less I want serrations. On a 5-1/2 blade and longer, serrations don;t much get in the way and are there if you need them. Even then, though, a longer, plain-edge blade is what I always opt for.

Earlier in January, we were digging up and moving a tree from the horse stables and had dug most of it up and cut most of the roots. We tied a 1-1/2" nylon braided rope around the hitch ball and the other end went to a huge strap around the tree at the base. Using a slipknot (against my friend's wife's advice - she knew what was going to happen), as soon as we started pulling on the tree the knot tightened up around the ball. We could not, against all efforts, get that knot loose, so the only alternative was to cut the rope. I used my BM-Nimravus, which is razor-sharp, but it wasn't making much headway on this old, dirt-embedded rope. Luckily, it has a partially serrated blade which sliced right through whith little effort. I was thankful that day that I had a serrated edge but it's the only time I can remember serrations being anything more than a pain in the butt.

Anytime I'm in doubt, I do without...... serrations of course