17-85mm kit lens
When I first read that my 17-85mm kit lens had a significant drawback, ie, light fall-off at wide angle, I thought “<groan> I have a crummy lens.” But then I found this:
With a (full-frame) Canon 5D and 24-105mm L lens, the light fall-off is twice as bad! So I shouldn’t feel bad about my 17-85mm. Light fall-off is a persistent problem with full-frame bodies and wide-angle lenses, in general.