I did a few switches in the CSS of my WordPress theme. Primarily, I swapped out the serifed fonts (well, except for my name up there), got rid of some white space between lines, changed some colors, and added a textured background (although this particular one might be a little too dark).
For comparison’s sake, here’s what the Twenty Ten theme looks like as a default.
Let me know if there’s anything else you think I should tweak.