I used to hate the tilt...I would even crop and rotate to make sure power poles were completely at 90 angles.
I started doing the tilt when I realized how it can really punch up some photos that would ordinarily be pretty bland. I am not even sure when the "tilt" kicked in, but it has. I sometimes will snap it straight and then tilt. I really like the effect on vertical portraits.
I love it now, but I have to be careful not to over use it.