Is 200mb data plan enough?

noww i want an upgrade, and i don't have an internet plan now.

i want to get the 200mb plan with a G2 and i was wondering if that enough data.

i mean i would use wi-fi wherever i can' but other then wi-fi, if i was to use the internet i would maybe check my fb once and a while and idk about apps' haven't experience apps unless it an iphone

i dont use GPS unless i REALLY need it.

and idk what else would take up internet. maybe youtube if i gotta show my friend a song' but that doesnt happen to often

soo please give me feeback' really need it

gotta convince my mom and i don't want to hear upgrade to unlimited cause that just wont happen :/