Music to run to....

Unable to attend hockey training and having not exercised since before Christmas I decided to hook up my wee ipod shuffle, lace up my new Asics trainers and hit the roads of Dublin 18. So off I went with lovely upbeat tunes helping me along my 10km route....however I had used the 'random fill' function on iTunes and so when I most needed a rousing backbeat to help up get up the hill and home my eardrums were assaulted by Enya trilling away. Perhaps it was the fact that I was tired and in pain, but the warblings actually lulled me into a trance like state, thus enabling me to get home without collapsing in a heap on Sandyford Road.

Now my dilemma is thus: do I load more ballad-type songs for my longer runs or stick with the Chemical Brothers, Missy Elliot and the Prodigy?? What do folks listen to while running??