To me it doesn't sound like necessarily you want to be doing web development, more, like a tech design role that was at webfactory/play when I was there.
Web development to me means asp.net web services (asmx), asp .net web pages (aspx), java server pages (jsp), javascript and css. With an emphasis on the first two (javascript and css are probably more along the lines of what you're thinking). Would like to learn some php at some stage but I doubt I will.
As mentioned though, HTML 5 is supposedly the one to look out for at the moment. Question is, which appeals: Design/Appearance, or Coding?