Didn't see Troy mentioned. Also Venus, and the area on 35W between Alvarado and Grandview is really bad. Most of the time it's highway patrol, so the local revenue restriction goes out the window.
As long as you are within 5 mph of the limit in the 75 zone, you won't have any problems on I35W. Alavarado, Itasca and DPS do work that stretch pretty good, as you noted.