When I started at Twilio, I set my title on whatever chat we were using to something silly like "Director of Naptime Initiatives". (Well, ok, when I started we just had a poorly-used internal IRC server, so I guess this was a bit later when we got HipChat or whatever.) Sadly, these days the title field on Slack is synced with Active Directory, which has the human-readable title name, plus the level number.

It's really dehumanizing. I think I'd rather not know people's titles, just what team they're on, and their role.