What was the last dumb phone you had before your first smartphone?
I rocked a Samsung Alias 2 for 4 years before I got an iPhone 5. The e-ink keyboard was awesome how it changed when you flipped the screen open to portrait or landscape.
I had the James Bond edition of Sony Ericsson C902. The camera was nice but the UI had frame rate issues. I came from a brown SE K770i which was buttery smooth.
From C902 I went to Sony Ericsson Xperia X10, my first touchscreen phone and first Android where I learned about apps, OS updates, fustom ROMs, etc. What a fantastic phone that was.