Agreed that certain blocks are better than others. Check out the above mentioned listservs and the MPD website for the 4th District. I think everyone would advise to walk around the area to get a feel for the street, at different times of the day/night. There are definite problem areas, such as Crittenden, 300 block of Delafield, and near corner stores. Look at the amount of litter also gives an idea of the block. Look for folks out walking their dogs/kids. Hope this helps a little.