When Vista dropped, public opinion of Microsoft started to go out the door. That was right around the same time that Apple released its first iphone (2007), and with a failed OS and a hugely successful device release by Apple, Microsoft fell by the wayside. Public opinion tanked a bit, and it seemed like the only "positive" energy was Steve Ballmer. Whether or not you can call his energy "positive" is debatable, but he was certainly energetic. Few employees actually liked Ballmer though, so when Satya came on it was a breath of fresh air. Satya came in at an absolutely perfect time - hololens and windows 10 were just about to be announced, meaning he'd get immense credit despite only being here for a short period. With a new CEO, Hololens, and Win10 on the horizon, public opinion (and our stock price) of MS has started to go up. The corporate culture in the last year has changed drastically, and support for open source internally has shot up (which as someone with a linux/unix background has really made me happy).
Four or Five years ago, if you'd asked me what tech company I worked for, my answer would have probably been, "Microsoft, I know, it's a bummer. I'm trying to move to google". Now though people actually think MS is cool again. The stuff we're working on is exciting and the corporate culture is starting to get healthy.