I started with 28-135 kit lens and was amazed how good it suited my needs. I could not imagine how one would live without 135 mm.
Then I switched to 17-55 and gave 28-135 to someone else. 17 to 55 is all I need ! Ever !
Then I swapped the lens for 24-70 and really liked the range, especially near 70mm where it worked well on my 40D for portraits.
A few month ago I got a 10-22 and it does not want to leave the camera, The majority of shots are taken with it.
Go figure !