Alright, I'm super excited to be here, and glad this is one of the first things I'm running into.

"Greatest" is a really broad umbrella which just means you've given me an excuse to be super wordy.

I cut my teeth on Shadowrun, and I still have a lot of affection for the background, but I haven't played for years. I'd love to try again though, depending on which rules were being used--my dream would be somebody putting together a Savage Worlds port that I liked, or completing my own.

My favorite system right now is Savage Worlds--I admit I kind of like generic systems, my prior favorite was GURPS and I still have a ton of GURPS books lying around--which isn't to say I think it can do anything... But it can pull of a surprising variety, usually without much work if you know what you're doing. It's pretty much the system I've been looking for my whole life, it 'ticks all my boxes' for how I think an RPG 'should' work.

That said, I have had an awful lot of fun with Feng Shui, too. Only ran FS2 for one short campaign, and it didn't work out as well as I would have liked, but my friends and I had lots of good times over the years with FS1, including one campaign that stranded the crew of the original Enterprise in the Netherworld.

Greatest overall, I'd have to go with Savage Worlds, it's just my favorite and I think it will be for a long time yet.