Ok...so I have read almost every post on this thread and have learned some technical knowledge, and a lot about human nature.
So just to add my two cents...
I, myself use WiFi at home on both my Android smartphone and my Blackberry. My primary reason is the the WiFi is faster than my Sprint service where I live. I only get a crappy amount of 3G speed where I live. I am, however, conscious of my Mobile Data usage too.
As for speeds, I have to agree with the posts that question why someone would need blazing data speed when only doing e-mail or something like this forum. I mean, why does someone need a really fast speed to do something text based?
As for WiFi at work, I don't use it. It is not because I am trying to use or abuse the Sprint network. The WiFi an the company I work for, tends to block personal e-mail (Gmail, Hotmail, Yahoo, etc), so it is not really useful. Also the work WiFi is password protected, so if I did want to connect to it, I would have to give my phone to the IT Specialist to load it, and its not something I would prefer to do.
Ok...so what is my point? My point is that I agree with others here that say, use WiFi, when it works for your purposes. I mean, if you are doing activities that do not require fast data speeds (like e-mail), or if you are downloading an app, then use WiFi.
I do not believe, however, WiFi usage should be forced by your device. Because, like at the office I work at, it does not work for your usage, you should not be forced to connect to it.
KCT - "No Matter Where You Go, There You Are!"