I do enjoy 'away time' from my husband. Some people have commented, even, on how surprised they are that I will take vacations without him, just with girlfriends or whatever. Sometimes he just doesn't want to do the things I want to do and why would I make him suffer through stuff?
I went to Italy with a friend of mine for 9 days last year to climb and drink wine, and it seemed perfectly normal. I guess it's just whatever works for each couple.