I switched to Linux about a year ago. I was a windows power user and now I'm a Linux noob, but couldn't be happier.
I hate to say it, but there's still reasoning to have Windows. I use a VM with ameliorated windows running for the few things I can't get away from.
For others, I tell them my story. Most people I talk to won't or can't make the switch, which I'm respectful of. To those that would benefit, I recommend at the minimum O&O Shutup but highly recommend ameliorated. This has been more welcomed.
People won't care until they have a reason to care. I'll still be around when they do.
I find that one of the biggest differences is the file ownership/group design, and the non admin user. Sure, it might not come up in a straightforward manner, but it will.
Why do I need to put in a password all the time? How come I can't just move this file to another drive?
This might be too "advanced" for what you're looking for, but I think even basic usage comes across this.