Sega without a doubt.
From my Master system to the end of the Dreamcast Sega has always given me the thing I was looking for.
Outrun, Space Harrier, Afterburner, Golden Axe, Streets of Rage, Sonic, Vectorman, Virtua Fighter, Sega Rally, Phantasy Star, Panzer Dragoon, Shinobi, Skies of Arcadia, Jet Set Radio, Shenmue,...and that's just the stuff that comes to my mind right away.
Sega has made so many good franchises and/or games and a lot of them are classics.
Sonic might not be as great as he used to be that doesn't mean that Sega doesn't make great games anymore. They still make good games and have a hidden gem from time to time the most recent one being Valkyria Chronicles.
Just looking at what they'll be bringing me this year makes them my favorite. I'd have to say from all the developers out there they have the most impressive line up for 2009 so far for me. With games like House of the dead: Overkill, MadWorld, Bayonetta, Sonic and the black knight, OutRun Online Arcade.
And if we're lucky we might also see Phantasy Star 0, Yakuza Kenzan and Yakuza 3 this year.
<message edited by Demonoroth on Jan 07, 2009 15:51>
Wii code: 2072 1110 4558 6538
Smash Bros Brawl: 1848-3246-8526
Mario Kart: 412452409500
Mario Strikers: 120360 413659
NiGHTS: 3737-8754-6785
PES 08: 4339-4437-7901
PSN: Demonoroth
pm me if you add anything