Yeah, I know, your way of building does get you up there faster =D. Its just my way I guess, I always assume that my opponent has a map hack or knows my every move, it helps me make better decisions. So I tend to get a barracks first and pump out a marine. (Usually with spare funds which I tend to always have), I make a bunker near the CC and shove the marines in (This assuming that I dont wall myself up). And yes, one full bunker can hold of just about any early rush at that time taking enough scvs repair it. (Usually 3-4 scvs are needed to hold off most zealot / marine / zergling attacks). But yeah, if your going for speed and walling up, by all means build your depot first but I dont have much supply problems doing it my way so I guess thats another reason I use it.

"You called down the thunder, now reap the whirlwind"
"Im about to overload my aggression inhibitors"

"It says....push any key...er um, which one is the 'any' key?"

"Knowledge is Power. Power--Leads to Corruption. So we all go to school to be Evil!"