Lately, I've been experimenting with different openings, namely 3-4+3-5 and 3-3+3-5 openings. I find 3-5 to be very useful, since it emphasizes outer thickness as opposed to the corner. With outer thickness facing an enclosed corner, I get a nice moyo, and attacking position. Trouble is, I haven't played enough with this fuseki to learn what its weaknesses are.
I've also found that I'm a couple stones weaker when I take white. I feel that I'm around 7k as black, and maybe 10k as white