For the past 9 years I have successfully traded every fixed income product from Germany and the US. I started out in the Schatz and moved to the Bund. For the past 3.5 years I have concentrated mainly on the US 10 year, moving away from the Bund. It seems the 10 year trade is a bit more readable then the Bund.
We used to have way more Bund traders in our shop, but over the years, it seems the US 10 year has become the more favored trade. Plus being in the US (if thats where you are) you are surrounded by the economy and other direct influences that the 10 year future will follow, as far as a daytrade is concerned.
My $.02.