I would love to come up with a very original answer, but I gotta agree with Dr. Bob...
When I'm awake...
On the other hand, I have to say that for me playing the guitar (in general, occasionally I find myself playing an instrumental) is always combined with singing. It's that particular combo for me. That's what makes me tick. (is that a correct expression? :dry: ) In my deepest darkest hours I still play and sing.
So to rephrase that a bit:
I love playing the guitar and sing, when I'm awake. That should be the line for me.
Ness B)