Well, if your parents are being highly psychologically (or God forbid, physically) abusive to you, then snapping back at them is the mildest form of fighting back!
In which I case I personally think its very healthy to fight back! And in which case I would say: keep snapping, and snap back hard and fight fight fight.
BUT... for most people...
If your parents are just being a bit typically annoying, and a bit overprotective, and a bit shocked that their "little baby" is now growing up... and a bit clueless about your generation...
Well... then join the club!
In a case like that I would then say you should cut your parents some slack!
In that case I wouldn't recommend snapping at them too often.
Instead, PICK YOUR BATTLES...
And be willing to snap back on the ultra-ultra important things only. But for the daily day to day things, just smile and listen to what they have to say, and nod appreciatively, and just remember:
You do NOT have to do what they say... but there's no harm in at least listening to them, and seriously considering what they say, and then smiling, and being loving and being diplomatic and somewhat respectful towards them.
They're your parents, and unless they're abusing you severely psychologically or physically, they do deserve some basic respect.
FINALLY... remember that annoying cliche line in life:
You'll catch more flies with honey!
In other words: if you're usually respectful and listen to them, and sweet and smiling at times, then... you can usually melt their hearts and get your way with sweetness when you need something, or need their extra support!
If you truly love your parents, and they're not abusing you, then it won't be too hard for you to show them some love now and then!