I got the nasty smell and taste with a brand new cartridge. Granted, this was with a Crown 7 cartridge, which appears to have a finer fiber material than other cartridges I've tried. Anyway, I was smoking a brand new cartridge, got a few clean puffs, and then started noticing the smell/taste. I pulled off the cartridge, and sure enough there were a few black bits in it, which appeared to be burnt fibers.
That was pretty much the last straw for me. When I got home that day, I ordered dropper bottles.
For the reason I mentioned previously about dripping not allowing me to smoke the e-cig non-stop all damn day long, I like dripping better so far. It's not even inconvenient; when I want a "cigarette," I go to my e-chamber, grab a dropper bottle, pull the mouthpiece off the e-cig, drip a few drops, put the mouth piece back on, put the dropper bottle back, and that's it. The process actually takes less time now than opening a new cartridge did. It even feels a little bit more like the motions you go through when you light a real cigarette.
The only thing that bothers me is that the unlabeled dropper bottles filled with amber-colored liquid are a bit conspicuous. I can definitely see one of those falling out of my laptop bag at work, and if my coworkers saw it, I've have some 'splainin' to do. My solution to this is to go out and buy a bottle of "Sweet Breath" from Wal-Mart, empty it out, and then use it for on-the-go drip smoking (thanks, Rat, for that idea). That seems like it would be fairly easy to manage, and no one would think twice if they saw me with it.
As for drip smoking being hard on atomizers and batteries, I haven't had a problem with that (yet). I've put as little as 1 drop and as many as 6 drops into my atomizer, and I haven't noticed permanent decline in function. Yes, when I flood the atomizer, it does keep it from heating properly, so very little vapor in produced. The solution to that problem for me has been to tilt the e-cig back a little bit, so that the liquid will drain way from the atomizer, and then take a draw. After a few draws like that, the amount of liquid is decreased and I'm back to normal e-smoking. As for the batteries, I've not noticed any leakage from an over-filled atomizer into a battery yet.
So, I don't see myself going back to cartridges anytime soon, at least not until they figure out a better way to make them. I'm sure keeping your cartridges topped up is certainly better than smoking half-dry cartridges, but I'm enjoying drip smoking too much now to go back to cartridges.