I always found that POS M60 to be very offensive, especially when I had to carry that bitch. But then, I'm a sensitive guy. I thought my relationship was gonna work out better with the M60E3, but that bitch offended the fuck out of me too.
I'm not nearly as offended by the '240, although that motherfucker is even heavier, but hey, ya gotta love a classic.
Lots of people get hurt feelings from the 249, but its always worked for me, and I've always thought it had lots of sex appeal, so I've never found it to be offensive.
Recently one of our squad leaders allowed a troop to lose track of a M249 (briefly), when the First Sergeant found out everyone involved got very defensive about the whole issue.
SUMMARY:
M60 - OFFENSIVE
M60E3 - OFFENSIVE, but pretty
M240 - NOT OFFENSIVE
M249 - DEFFENSIVE
I hope this helps clear things up.