I like serrations on some knives, but I haven't bought any such knives for a long time. Probably because the ones I have are useful enough. They are great at ripping into tough material and sawing, albeit in short swipes I originally though would be too short to be of much use, but I repeatedly found out that, no, short as those combo-edge serrations run, they've been plenty for the cuts I've made.
I used the serrations on this Benchmade to saw a 2x4-framed shipping crate into small enough pieces to toss into a dumpster, and they've cut well through plastic and aluminum, too.
I've carried this Spyderco Tenacious a lot and have used the serrations to gnaw through tough/multi-layered cardboard, and to rip through ropes and strings. Much to my surprise, I bent one of the teeth while cutting through an apple, said tooth encountering a tough wee bugger of a seed.
I've carried this Spyderco Snap-It, a gift from a friend, a lot while in and out of and around water while dealing with boats and ropes and nets and lines of various sorts. It's very light and handy.
But I think Spyderco totally put the very handy clip on the wrong danged end of the knife because it inevitably -- no, worse,
unevitably! -- gets in the way of stabs, pokes, and cuts, bouncing against and jostling around the edges of some of the work (I suppose they did that to keep the OAL short). Oh, and yes, I've actually snagged into that hook bits of rope and twine and cardboard while thinking I was starting a cut. (Rare, sure, but oops.) Nonetheless, it still remains a cool and handy thing to clip onto gear, and for that reason I'm glad to have it.
I've used this neat little Boker AK-74 for years as an EDC, too, and the serrations have been handy in the garden to cut woody stems of various sorts, and to gnaw apart some tougher bits of cardboard.
Would I buy any more partially or fully serrated knives? Maybe. Dunno. Depends on what might catch my eye and what use I might have for a new one. But these have worked for years, and I suppose I'll likely simply keep using them.