I love all three. I don't think I have a favorite -- I never had any one of those games take over my life or anything, nor did I get too heavy into high scores. I probably lean slightly more toward to SSHD and NAN since I've put less time into GW and I love the 3D fields.
I like Everyday Shooter most of all, but it's a very different game.
Am I the only person who finds GW2 unplayable because of excessive bloom and stuff all over the screen? I prefer the simplicity of GW1 (I still suck at it). I wish there was an option to tone down the effects.
Never played NAN, but besides that geometry, for me, is on a pedistal that few other games can match. It's the perfect casual and hardcore party game with great modes, gfx and sound. Only other game that's even close is Mashed on polar warf and fast slippery vehicles.
These top down spaceship shooters kind of remind me of Silent Death Online. That online PC game was fun as hell back in the late 90's. Too bad it was pay to play. If only it could be brought back to life on home consoles as a downloadable title.
I haven't played any of them, but plan on getting Nano Assault Neo once I pick up a Wii U some time next year. Geometry Wars always looked hypnotically addictive.
Geometry Wars will always hold a special place in my heart with it's minimalizm and focus on pure gameplay.
And Super Stardust is doing the same thing but with a more visual impact and a better weapon upgrade system.
As a complete package I like Nano Assault the most since it has environments ala Super Mario Galaxy that actually matters, more varied levels, weapon purchases and a more strategic gameplay style than the other two. Plus, off-TV play makes it an instant winner either way.