The ones I keep going back to? WFRP 1E. Pendragon 4th (despite having 5th). FFG Star Wars (my most run game). L5R 5th (which is 3rd most run, after AD&D 2e, but I'll never go back to 2e). (4th goes to WEG Star Wars.)
My most used tools?
- Staedler grey-barreled markers - they're water soluble for months after use, and available in X-Fine. And refillable. And available in sets from 4 to 18 colors...
- refill pots are only reasonable price for the core four.
- Staedler black barrel are alcohol soluble, but don't use the red or green on vinyl - they stain it. I've erased them from page protectors at ages varying from hours to years after application using isopropyl. They have their own refill pots, too.
- As a set: A double set of Mini-meeples (get two samplers). A set of 8mm wood gaming cubes (get the 50-pack of 5 colors). A triple set of 15mm disks (10 each in 3 colors). I use these instead of minis. I also got a set of 10 white mini-meeples... and my players decorated their meeples to suit. Which is how I wound up with a white mini-meeple in a green bikini - the female player of a female druid had me draw it for her. Vicki - I think of you every time there's an argument over who gets the bikini meeple.
- a good set of plastic playing cards (used for those games needing them - Savage Worlds, Twilight 2000/Dark Conspiracy, Castle Falkenstein, Arabian Sea Tales.)
- KEM, COPAG, ACE, certain Hoyle and Bycycle decks, even the Nintendo Legend of Zelda cards
- good quality poker chips. (not the $5 interlocking nastiness Bycycle sells as their low end. Those are noisy. The 11.5g at walmart/fred meyers/etc at least don't make the same level of noise.)