OSX still has very little adware attached to downloads, in my experience - plus there's the Mac App Store. It's pretty much just Windows users who endure that.
Installing "common" software is a doddle too, wth Ninite. You get Firefox, vlc, Dropbox, spotify, Skype (now in windows updates though) notepad++, up to date Java and .net run times, pdf reader etc etc. I set up the installer once about 3 years ago and the same one still works, with a one click update.
As someone who has used Debian almost exclusively for a few years now, I've got to admit that Windows 8 really does handle drivers nicely. Linux systems are generally pretty good about drivers these days, at least if you allow proprietary drivers, but nothing beats total out-of-the-box automation.