How do we feel about them? Personally I rather like a good dream sequence - an excuse to get a bit trippy and symbolic. One of my favourites is the House of the Undying sequence in A Clash of Kings (Ok, ok, it's technically not a dream, but it has all the hallmarks of one). It's trippy alright, and cleverly symbolic enough to keep you guessing as to what the meaning is. Crucially, it doesn't follow real dreams faithfully in that there's a running logic to them while real dreams tend to be all over the place. It's also done well in The Wee Free Men, where some of the traits of dreams are explored, such as details about the dream-world being rather sketchy until you pay attention to them.
What does everyone else think? Are they good fun? Tiresome? And how would you feel about them in a pokémon fanfic