I'll always be in an old-school time warp! Windows 3.1 was the first operating system I ever used, and I still have great memories of it. It's still usable for just about anything except the modern Internet (though with Netscape 4.08, Opera 3.62 and/or IE5 and a good proxy most sites can still be navigated--I'm even able to log into mobile Facebook/Twitter and post statuses/respond to messages, though the options are limited and the rendering is a serious mess [with or without CSS activated]). If you regularly log into an e-mail account then I'd recommend using at least NT 3.51 or 95 at this point, since these older browsers don't support proper SSL/TLS protocols for such a purpose and none of the proxies I've tried with 3.1-compatible web browsers make it possible to log into my Gmail account.