Welcome to the Dream Views forums, rebbit

Nice to hear about your vivid dream. If you dont mind the extra "work", I'd suggest you try doing reality checks. Takes about twenty per day to really work and a few weeks for them to start working, but I was able to achieve two lucids per week just with RCs and keeping a journal. They're not that effective compared to some other techniques, but you can't go wrong with them either. Just make sure to make one of your tests is the nose-pinch test.
The B6 should help make your dreams more vivid, but some people who were taking 200 mg per day (the maximum "safe" amount) also reported that it can make dreams more "dark". Not in a literal sense and I'm not sure how they meant that, just thought you might want to know about it.