I'm not the kind of guy who sits around at home and writes songs. Once in a while I'll pick up a guitar and noodle around, but it's rare.
I find it much easier to write comic-books than lyrics actually because it's a natural dialogue. Writing song lyrics is not natural but over the years I know what I need to know to get it done. I find it quite easy to capture a character and use my own personality and humour.
A guitar for me is pretty much strictly in the context of writing songs for my band, coming up with ideas with my band, and then being able to perform those songs as best as I can on stage - that's what the guitar for me has always been.