I figure I'll take the easy way out and grab a medium, something adaptable but somewhat lacking in specialization. Able to fly, swim, and walk and all that jazz. Keen to figuring out exactly how big the differences between soldiers and pilots will be just to get an idea of how I should put together my person. Course I could just be missing something obvious, don't be afraid to say so. It has been a while after all.

AB: As for multiple arms and legs, I would heavily suggest they be mainly on walkers. Seeing as though in space, legs have no real use. Though I suppose it 'could' work for melee grapples, but probably only for larger mechs. I'll think about it.

Geminex: For that you'd probably have the lightest armor possible. I'll be including energy shields into the mixture, with yours probably the strongest. You'd also have a boosted energy supply, for longer range radar and heavily boosted radio transmissions. Not to mention longer range scanners with power outputs, damage assessment, radar jammers and most importantly, better boosters. All of this would leave you with rather weak weaponry in terms of engaging the enemy, probably leaving you to only be able to engage other light armors.

Krogoth: Super-mechs would probably fit into the bomber or superweapon roles, carrying the strongest of shields and practically planet smashing weapons. Like nukes and such.

As for sign-ups, I'll get right on them.

Edit(oi, posting while forgetting to refresh, great idea.):

Overcast: You're looking at stabilizers for underwater battle and I'll be including sort of 'Leviathan' mechs for mainly underwater fighting with limited on land battle capability.