Definitely trailing commas. Close to 20 years of programming in C leaves you kind of set in your ways, and there's an involuntary wince whenever I leave a comma hanging, followed by relief when perl says, "Yeah, no problem", when the C compiler would say "Uh-uh, can't do that" and force you to change it.
And the frustrating thing is, I can see arguments for both sides .. I just like being on this side of the fence right now.
Alex / talexb / Toronto
"Groklaw is the open-source mentality applied to legal research" ~ Linus Torvalds