Everyone is different in their favorites and least favorites. There is no right or wrong.
My favorites are single blade traditional knives. Single blade because they're usually slimmer and ride my pockets better without bulk. Either lockback or folder, half-stop or not ... although I prefer lockback for a couple of reasons. One, safety and two, usually easier to open and close. Clip, drop, spear, sheepfoot, lambsfoot, wharncliffe are my favorite blade shapes.
Liner locks work for me too but aren't favored over lockbacks simple because most are for right handed people and I'm left handed.
I love Barlows but don't carry them often. The ones I have are weighty little two blade chunks.
Stockman, I want to like a lot, I really REALLY do, but just don't find more than one blade that useful to me day to day. Plus I don't have a herd or flock.
I've never even owned a two blade Trapper and I've owned knives for over 60yrs. Never really understood having two similar size blades when one or the other would do.
Maybe the biggest appeal of knives with more than one blade, especially a working knife, is the fact that another blade is handy when one blade becomes dull but that's rarely been a factor for me.
Those are just general favorites and least favorites, there are always examples of exceptions and I probably have one or two of those too.