Bieng a social scientist myself I can't help comment on your survey. Your doing a partial quantative study, while I get the impression that the categories weren't the outcome of a previous qualitative study, but just educated guesses. Especially question 2 and 3 give me that impression. First you have an open question asking what I like in my favorite website and then a question asking what would make a website a favorite, but only then I've got to choose between three categories. Let's say its my favorite website because it has good games. What would I choose at question three? Four is actually an open question, while that could be easily categorised to make statistical analysis a lot easier.

I would say change question 3 in something like: "What would you like to see improved on that website and why?" (Double question, but I don't think it's a biggie here) Make questions 1, 2, 3 and 5 open questions. Make 4, and maybe 1 so you could do a content analysis on the websites first, closed questions.