Graphics is one of the top reasons people uninstall this game. Even if I make the textures look amazing, if they're not aligned in maps, they still look bad. There are hundreds of mediocre looking maps out there - don't you want to put in the little bit of extra effort to make your map look better? You could probably fix those textures in the time it took for people to point them out.
BSP tip of the day: Right-click on a brush face in the 3D window to "copy" the texture, ctrl+shift+right click on another face to paste. Align one face, and it should take just a few seconds to align the rest.
I've put B2 up on the beta server. Most of the suggestions in my demo still stand.