I almost got into mining a year or so ago, but never quite got around to it - wish I had since BTC has gone up massively since then!
I finally started mining just before Christmas, on a couple of Nvidia 780s, an R9 290 and some CPUs. I've been mining Quark on the CPUs until today, now I've switched them all over to Particle so fingers crossed that one takes off! On the GPUs I started off with LTC, then switched over to Hashcows / Middlecoin with a couple-of-days foray into OGC when it launched, as much so I could be involved at the launch of a coin (and do a little solo mining) as anything else.
I'm hoping that Quark picks up in value this month, as I've converted the 0.3 or so BTC I've got from the switching pools so far into Quarks. Not big money, but a reasonable chunk of what I "invested" at the beginning (I already had the Nvidia GPUs but bought the 790 just for mining).