Which one of them is the most iconic and is the best introduction to an album?

Phresh Out The Runway or Mad House

Mad House!

Phresh Out the Runway sets the tone perfectly for Unapologetic. It's Rihanna's best boast track after Hard.
You da One is second best.

Umbrella

I'm here for "Mad House" winning.

maybe POTR
I hate when albums just start with the singles or big songs. Same thing with PRISM, opening with Roar?
Even BEYONCÉ, I always start the album with Ghost.
Coldplay is one of the few major acts that properly start their albums with an intro and they always end them with an outro.

Mad House or Phresh Out the Runway

Wait. People like Presh Out the Runway? That's news to me... I'll say S&M.

Mad House gets the job done perfectly

It's a close race between S&M and Umbrella

Umbrella is the best but Phresh Out The Runway is my personal fave

mad house and phresh off the runway set the perfect mood for both albums. s&m is a great bop. you da one is a bad album opener, it doesnt even sound like it should be on TTT, more like loud.

Mad House or POTR. That's a tough one

I hope R8 has an intro track.

Mad House is the best as an opener, but my favourite as a song is POTR

S&M
Worst is, by far, Phresh off the Runway.

Umbrella.

The mixtapes getting no recognition, as usual.