I have to say that all I care about from websites is content. I don't need anything other than text, and possibly thumbnails for images.
Any site using pop-ups, cumbersome scripts or flash just annoys me - and I'm on an E1 most of the time, so it's not bandwidth considerations.

It's just the annoyance of having extraneous junk you need to close/stop/get past and it wastes time for no reason.

I'm starting to mentally filter the ads on Slashdot (most of my work machines have unchangeable configs so no adbuster or clever proxy stuff will work here)