Hello from Finland!
Been playing for around three months now, career mode only so far (just unlocked the last node in the tech tree, yay). I've never been much into gaming, but KSP changed all that. Somehow I've managed to put in over 300 hours already. Thanks for a great forum, thought it might be time to sign up!
A side note: I bought a new computer for my home office last year, and the best deal with the specs I needed happened to be a gaming computer. When I first opened it up to add some more memory and saw the enormous graphics card, I went "Wow that's a bunch of power completely wasted" since I thought I'd only do 2D stuff like before.
Guess if I'm happy about that particular coincidence now!
(I play on Linux (Ubuntu, steam), I use KER and KAC, otherwise stock.)