As said in the title, this is really a brainstorming thread for Pickup Games in the Dragonchat, if I run some in the future. Which is probable, but I'm still only posting it here instead of in a Q&A in case.

The class system is intentionally simple, so that character creation and definition is simple

World, map and stuff

The players would define their characters' skills using these words, basically. Combined as wished, but of course it'll mean that the more classes one has, the lesser the skills.
They are meant to only reflect one aspect of... well, skills, to get the skillsets as simplified as possible.

-Soldier: defensive fighter.
-Brawler: unorthodox, dirty fighter.

-Thief: stealth and sneakiness. Ninja!
-Acrobat: movement, jumping, climbing (or should I say, "spitting on the rules of physics".)
-Marksman: shooting at people with many weapons.

-Handler: animal handler. Attack, minions, attack!
-Charmer: talker, bluffer.

-Tracker: finds people and things, through any methods.
-Engineer: handyman. Makes things, and fiddles with things.
-Alchemist: potions and poisons. And alcohols, of course.

-Sorceror: classic magician. Likes to use flashy effects.
-Runecrafter: the discreet magician. Uses Ancient Runes(tm).
-Pactmaker: who needs power when you can ritually enslave someone or something else and use theirs?

It does indeed say Brainstorm at the top. I'd like ideas, comments and suggestions please