I like watching the Bengals' preseason games to see the new players. And I used to care whether they won because they went 17 years in a row without a winning preseason. I don't care how bad they might have been, that is an INCREDIBLE streak. Then they went 4-0 a couple years ago and didn't make the postseason, so now it doesn't really matter.
I will watch other teams' games to check out new uniforms.
Jimbo mentioned the Lions play the Bengals every year. That was true for every year since the merger until a few years ago, when the league took over scheduling most of the games. The Bengals and Lions hook up again starting this year.