I love the shit out of SNK, even though they're probably the most feckless/luckless developer of all time. Yes, even more then Sega.
the Dreamcast introduced me to superior 2D gaming, and as such, superior 2D fighting, in which of course, SNK guided the way. Later on I bought ast many of their great damn PS2 ports as I could and loved them too. Even knowing its probably pretty shitty, I would still probably drop cash on a PSN release of their 3D Metal Slug game, that's just how I roll.
oh, and Metal Slug Advance was fucking awesome and deserves just as much love as any of their other games from their golden age.