Game Expectations

Spheres-only or as an additional option? Spheres only, and no standard magic/spells. Meaning you can use the wizard class if you want, but you have to add a Spheres archetype that replaces spells. There will be no spell-trigger or spell-completion items using standard Pathfinder spells. No plans to port individual spells back in via the Ritual system, either.

Technology (Guns, vehicles, etc.)? Early firearms included, but otherwise no technological stuff.

Gestalt? No, single class is fine. Though I will be determining some amount of bonus feats and/or talents to hand out.

Mythic? No.

Elephant in the Room Feat Tax Fixes? No, I think EitR is unnecessary when you have Spheres of Might.

Spellcrafting/Techniques - No. Never bothered to learn these subsystems, to be honest.

Custom Traditions? Players may make custom traditions as normally allowed by Spheres rules and guidelines.

Which Spheres? I don't actually understand Spheres of Guile yet, I haven't spent any time with it. If anyone wants to offer tips for gaining a good understanding of it, then there's a better chance I'll be comfortable with it by the time I'm actually ready to start the game.