I think Courier New is a decent programming font. I think Courier Prime Code is a bit too stylish. I'm currently using DejaVuSansMono. Consolas has been my favorite for it's great LCD sub pixel anti-alias, but it's Windows only and with better pixel density screens we no longer have to use sub-pixel anti-alias.

I was about to write the same thing. I code in XCode and I love SF Mono. I was pretty invested in source code pro but SF mono is so good.