Good – Martial arts for self-improvement.
Martial arts develop confidence, self esteem and a whole host of other goodies.

Good – Joe Rogan. The Joe Rogan podcast is (indirectly) one of the best things to come out of the UFC. I’ve literally learnt more about diet and nutrition from 3 or 4 of his shows, than in 4 years in university.

Good – All the Gracie philosophies:
“Learn to fight so you don’t have to”
The Yogi style philosophies of losing the ego, tapping in training etc.

Good  – The positive role models.

Conor pretends to be a dick to sell fights.  Hopefully at least some people can see through that.  Randy Couture, Frank Mir, Mark Hunt, Crocop, all seem to be great guys.

On the other hand, Jon Jones, as nice as he often comes across, can’t really claim to be a good role model (not that he may want to)

Bad – All the massive egos that still remain.  For example, if you boast about tapping someone out in training, you’re probably a bit of a dick.   Big fish in a small pond syndrome can be a factor too. If you’re not getting tested, beaten, tapped etc. in training, you may need to train somewhere else.

Bad – Desensitisation to violence.  You don’t see the fighter throwing up and the long term damage a concussion often causes after a KO.

Good – technical mma

Bad – meathead mma. 2 fat thugs slugging it out at the local sports centre after 3 weeks of training.  Any video of the fight will normally have an annoying girlfriend screeching the background.