As a Dota 2 player with lots of commends, this makes me a little bit happy. I work hard for those commends.
Buuuut ... because I have so many "teaching" commends, I OFTEN get matched with new people. And this really makes me mad. The matchmaker sees that I have tons of "forgiving" and "teaching" commends, and it constantly puts me with players with 0-20 wins, even though I have over 100 wins.
In short, I like getting a discount, but I don't like getting a competitive disadvantage. I would rather pay full price, and get fair matchups.