I seem to have a small collection, though Rik's prob the guy to talk to on here I would guess
Ultralight alcohol's the way to go. Not too keen on them now in winter though in summer they're better. Just too much like hard work getting them going and too slow. Prob partly because I take the 28 mini version not the full sized set
Jetboil's great for hot food FAST with no hassle. Not so good for very cold use (cold UK winter), being cannister, but great the rest of the time. Not TOO bad on weight
Svea 123R is a bit heavier again but soooooo simple and reliable, I really do like it. Petrol / coleman fuel / clear wipe so great in winter too
Optimus Nova is a brilliant multifuel, about the same in weight as the 123 by the time you add a fuel bottle. Very hot, very reliable (though I still like the no-pump capability of the 123), love it... not sure about cost; used to be around the £100 mark but could be less now
Not had much experience with MSR (suprisingly maybe since everyone seems to have them) but they've pretty much ruled for years.
Pretty much covers the full range. For general purpose backpacking and simple cooking I'd say the jetboil's hard to beat.