We expanded our team line limit to 88 characters and that feels quite a bit better than 80. There are a lot of pretty common lines of code that once you're nested in a function/if statement/loop stretch out beyond 80 characters but fall comfortably into 88.
I used to use 100 characters as my limit and it was pretty nice. I switched back to 80 because most editors already mark the 80 character point and I didn't want to have to configure editors (basically laziness). I find 80 fine for most code. There are some cases where I naturally go over a little and its a bit clumsy to avoid it, but they're few enough that I don't care. Especially in Clojure code, I find that if things are that long, then its too nested and hard to follow anyway and I rearrange my code (use ->, ->>, let etc to split nested forms up).
In Clojure code, the most likely reason to go over 80 characters for me is let forms like (let [long-descriptive-names-that-get-too-close-to-80 (and we-have-hit the-limit)])
but overly long names mess the code up anyway and should be avoided. Descriptive is good, but too long makes it hard too read too.
