Yeah, the big G is my go-to G as well. But lazy as I am, in the end I mostly use the one that the least trouble to get to/from. But default it'd be the big one.
The C/G is also great for actual acoustic rock, it's got a really nice fatness to it. Like it a lot.
You're thinking of Big G.
Got ya.
Don't worry; I'm going senile, too! 
That's very reassuring. Although...
Wait...
What where we talking about...?
Ah yes, trout fishing. Rright.
Errrr...
