As evident by the wide variety of floats listed in the posts throughout this thread, many different floats work under various conditions...and I find myself switching quite regularly, but I find I don't really stick to one style as such. I like the DNE 20 gram float, it works really well for most of the conditions I find myself fishing in. I also use the balsa floats quite a bit, I really find both of these "sit" in the water very nicely, and I feel the tapered shape these floats have makes for better drifts...I find in some faster water, floats with a uniform thickness don't "sit" as nicely in the faster runs. Having said that, I do like to use the straight through dink floats from time to time, cut down of course to specific sizes of 3,4 and 5 inches.
Case in point for the bouncing bottom/dredging/angled float techniques I see people employing on the river some days, I was fishing the mamquam last week, and found that at the end of the day there were chum moving through a short trench that was about 3-4 Ft deep...Now, I short float religiously, and had been all day, and found that the only way to get into the clean fish moving through was to short float almost to an extreme...I fished that stretch for example with maybe 8" from float to weight...nowhere near the bottom, and I was able to detect bites quite efficiently. I noticed other anglers on the mam, and the squish who were very close if not on the bottom, and couldn't help but notice they were "bumping" fish all through their drifts, and likely were unable to detect fish biting their hook through the mass of hits they were getting on their weight...more often than not, they were setting the hook when they bumped a fish, rather than a legitimate strike.
Now, I hate setting a hook and not finding a fish there...I enjoy the peacefull drift of the float through the water I am working, and if I don't get a strike, I simply and calmly retrieve my line...when a fish strikes I know it, and have no doubts...there is no ambiguity as to whether it was bottom or a bumped fish, I find this much more efficient, as I can tell most others do here also. So, as bug pumper stated...that "big swoooosh"...."drives me nuts"...there is a certain level of impatience and a lack of focus and understanding of the technique that goes along with ripping the water at the end of a drift. It's almost as if the angler is angry they didn't get a strike...there's something wrong with that...
You can feel the subtlest of strikes with the short, straight up and down float...and you'll get more fish that way in my opinion, as hitting a fish on the nose or my friend with your weight is likely to deter a fish from biting more often than not...and like 2:40 said..."a fish hooked in the ribs" doesn't count in my books...
so for me the balsa floats and the DNE's are used most often, but the versatilty of a foamy comes in handy when you just don't have the right float for the job...a little "snip" to the right size, and you're ready to go.