My 2¢…
I haven't done a decoction mash.
That being said, a slight added flavor isn't the reason why I want to try it. I really enjoy the brewing process, and I think it would be fun to try a different method. It's traditional, and while it may not be "worth it" from a flavor standpoint, the experience has always sounded like fun to me.
There's enough of a debate about decoction than any benefit is slight, if it made a big impact we'd know about it. Therefore I say brew however makes you happy.
Something I've thought would be fun would be to do a decoction mash without using a thermometer. That seems to be partly how the process originated, to me it would be fun to try and recreate an old school dunkel that way.