Do you like to modify other people's WordPress themes?

I can’t find a theme I like just out of the box. I always end up making a series of modifications, to the colours and background image if nothing else. I don’t know PHP but I mod what I can with CSS. I’m finally satisfied with what I have now, for a while anyway.

What about you?
Yeah, if you read the question you’d know that I already know CSS and HTML, just not PHP.