I just have to say, I pay $30.00 for 2GB currently. I stream Spotify why at work all night 10pm-7am, with breaks of course when I get sick of music. Use facebook always why on my lunch or on the go, browse the web or check my e-mail. And in the four months I've had my phone have never even hit above 300MB, hell according to my bill I haven't even touched 1GB in the past four months total. I'll never understand how people can use up to 60GB in a few weeks. Makes no sense to me. Just like the Comcast data cap of 250GB, the highest with all my downloading from Steam and BT is only like 80-100GB monthly. (Gotta remember, Steam games can be up to 11GB)
I also turn off my 3G when it is not needed and use WiFi when at my house or at a friends that has wireless. Maybe I'm just smart with my usage? Haha.