Don't get me wrong, Dreamhost has been pretty good to me over the past year and a half, but I've been having some downtime and MySQL problems lately.
At this point my Dreamhost account is paid up until next April so I won't be completely jumping ship anytime soon, but I have started shopping around, and I plan on moving some of my higher traffic and high priority sites to another host.
Over the weekend I setup a new account with LiquidWeb, and I am going to move a few sites over there for the next month to see how things go. Hopefully I can spread out my sites evenly across the 2 hosts for now to lighten the load on Dreamhost, and eventually move everything else over as well.