I gravitate toward people who like gallows humor: make fun of the organization and management. It's "positive" to us, we have a good 'ol time. Human nature is really F'd up in a Dilbert-esque way in the work world in such a way it begs to be lampooned. "Positive" is relative.
One of the most entertaining forums I read is for a perennially under-performing football club.
It's real no holds barred stuff, as much about themselves as anything else, for wasting their money season after season and never learning.
By contrast forums where the vibe is to 'support the team' are dull and even oppressive.