BRP. It is so transparent a system that even someone who doesn’t get rules like me can see roughly what effect changes they write are going to have on the game. It is also really easy to adapt skill based games to different technology levels just by messing with the skill list a bit.

From about 1981 to 1986, it was 1st Ed AD&D.
From 1986 to 1993, it was RoleMaster/SpaceMaster/Cyberspace
From 1993 to 1996, I didn’t do a lot of gaming, but the two systems I was most interested in were The Mutant Chronicles, and Dreampark.
From 1996, until 2012, it was FUDGE, with a side-journey into 3.0 and 3.5 d20 from it’s release until 2005. (from 2005 until 2012, I took a bit of a hiatus from gaming).

Since last year, I’ve been delving into FATE, with heavy interest in WRM.

Fudge. Whenever I need a quick system for a new game, or even mod an existing game to my liking (happened with Mortal Coil), I turn to Fudge,

Tunnels & Trolls seems to be my “come home” game. I love Castles & Crusades for how they managed to FINALLY make the D&D system(s) work properly and logically, as well as quickly. Call of Cthulhu, because there is no better game for pulp adventure, horror, or modern times. Traveller for almost anything else.

Good Question. I always thought it would end up to be GURPS, but never actually got to play/run it. First D20 was my go to system, DND 3,5 and others that used it. But since a few years I am only playing Savage Worlds and use it as my go to system. So far I did not encounter anything I could not recreate with the ruleset. Granted, some things require more work then others, but overall it works great and has not failed me yet.

I’ve been having trouble finding a system that I can really fall back on for a long time. Years ago it was GURPS, but the new book is just too much to introduce to new players. I’ve tried FATE, Savage Worlds, BRP, and countless others, but none quite clicked with me. Recently, though, I was introduced to Ubiquity, the system from the Hollow Earth Expedition, and I really like it.

I ignored it before, because it’s a pulp game, and I was looking for a universal system But it’s very easy to hack, mostly just by removing talents or skills that don’t suit your setting. (A superhero hack would require more work, but that’s not something I’m interested in.) I guess the system hits a sweet spot – not too complex, but has rules for most anything I’d need to do.

I bounce between AD&D and a heavily houseruled Swords & Wizardry. I’ll give the edge to AD&D, since I’ve been running it for 30 years. It has Seniority. 🙂

SFX! variants (naturally, since I wrote them)

My “Go To” rules systems would definitely be BRP and Savage Worlds. Both are reasonably easy to grasp and both can be used for almost any genre. I’ve used both BRP and Savage Worlds to play Steampunk (i.e. Space 1889) and SciFi (i.e. Traveller). We used BRP to play during the French Revolution in a short campaign aptly called “1793”. And I – naturally – hosted and played years of “Call of Cthulhu”.
I have used and use Savage Worlds with severeal fantasy settings to introduce kids to RPGs.
I like GURPS a lot but you simply can’t just jump in and get playing – GURPS needs some serious preparation beforehand but it most often leads to a great gaming experience in the long term.

In the 1980s, it was AD&D2. In the ’90s, GURPS 3e, and in the 2000s, D20. Lately, it’s been OSR games and FATE.

Right now, SKETCH, adapted for Evil Dead. Open Game Night needs something fast and furious, if you’re not careful you could lose a finger.

Second is Mini Six Labyrinth Lord. OGN has three parties down the same dungeon.

My goto mechanics are Risus, PDQ, and Fudge.

I’ve used 5X5 1.0 and revised dice mechanics with some success. Jeff has been tinkering with it at http://dreamsanddragons.blogspot.com/