I really like this deck a lot. It definitely looks like it flows well, has great consistency, and looks like it'd be a lot of fun to use. I've always been fond of blue. It's my favorite color to use, I love the control it gives you with spells such as Cancel and Mind Control. I do, however, tend to advise against running single color decks, because it is so much easier for an opponent to hinder you if you do not have another color to fall back on, plus blue tends to have a small and expensive roster of creatures, which can create some problems. Other than that, you have a very nice deck!