I'd say most of my riding (99%) is done on the hoods or top of the bars. Rarely do I get into the drops. I've also canted my hoods up and inward a bit which has helped with the comfort level.

I used to have some upper back and neck soreness for most of last year even by altering the bar and hood positions. I thought at first it was my body getting used to the road bike position. What helped me was a slightly shorter stem and wider bars. I noticed an immediate difference as the tension in my back disappeared almost immediately. I guess I just don't feel so bunched up in my arms and shoulders anymore. Although from a technical racing point of view its probably not the most efficient set-up. I read somewhere that widerbars = less aerodynamics, more comfort. However, thats all that matters to me. Maybe not so much switching to a shorter stem, I was running 120mm then went to 100mm. I could probably go back to a longer stem, I'll see as the season goes by.

On a side note, I also used to get sore hands for a while too. I stopped wearing gloves and the pain went away.