Mined LTC for about a week to start with, then switched to VTC when I heard of the coming scrypt ASICs, still like VTC, competent and committed devs and it will be the premiere n-factor coin, in fact probably 2nd only to BTC within a year I believe, but have been mining DRK exclusively for the last few weeks. Initially was going to keep mining VTC and buy DRK but the low temps, low noise, and low leccy got me hooked on DRK.
Have faffed with multipools and betarigs along the way, plus a few other things, can't be bothered any more.
Also DRK was the first linux wallet I was able to build without any buggering about, instantly endeared me to the devs.
Ultimately I see more longevity in DRK (or what it evolves into) than BTC. I also forsee an almighty struggle with the powers that be, but nothing good was ever easy and if the suits and their thugs want a fight, well I'm half Texan, half Russian, and all Irish, god help them.