I dislike them for 3 reasons:
1) You sound like a marocca running around with them
2) I like the realism of running out of ammo
3) A lot of noobs with hi-caps just like to hose -you can't do that with a 50 round mag.
"Someone in a Prius tried to race me at a stop sign the other day. I couldn't believe it. I had him for the first 100 feet or so but I can only walk so fast."