I'm gonna go against the grain and say P. Not because I'm a P player and want desperately to believe that I have all kinds of options early on, but because I really think the power of the zealot and dragoon gives a few more options.

Here's a huge generalization about Terran openings: get to factory. Unless you're massing marines in vanilla, you're going to get to factory. We can call it g2f if you like acronyms. Also it's easier to type.

Toss has more options. Zealots, dragoons, dragoons AND zealots, DT rush, reaver rush, 5min temps, Arbiter rush (it's fun when you pull it off, usually only applies to vanilla, but thats what i'm playing right now) the stove (oh man, there's a throwback. 5 cookies to anyone who remembers the exact stove build order). I think with a protoss opponent it's tougher to tell where they're going. When I play vs Terran, I have one concern: is he marine bumrushing me? If not, I know tanks and drops and vultures with spideymines are coming.