Kanye West Smiling -- You Got Something Weird On Your Face, Bro!

Kanye West -- who thrives on anger like the rest of us do oxygen -- was sporting a strange accessory this morning in New York City ... an actual freakin' smile!!

Maybe it's time to give Kim Kardashian her props -- because ever since she got Kanye to walk down the aisle in Florence ... the guy has been way more toothy with the paparazzi than we've ever seen before.

Ahh ... that happy newlywed glow. Kinda makes ya wanna puke, right?