I wished I had a Blackberry when I was a much younger, but personally I miss Windows Phones a lot more.
Windows Phones were awful in general but provided something that no full featured smart phone can: simplicity. Notifications? Hardly. Browser? Barely works. Apps? Pshh. Instant messaging? I hope you like SMS! Games? There’s a couple good ones you never heard of that won’t be maintained. But heck, if you want peace and quiet and while still offering the basics in good form, the Windows Phone couldn’t be beat.
Do I miss my blackberry? Not really, but I do miss how excited I was to have a device that was actually useful. I feel like we're just iterating over the same base design these days, which is fine, but the excitement isn't there for me like it used to be.