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The first Stones album I bought was Tattoo You. That was the new album at the time - I had my dad's Let It Bleed, Get Yer Ya-Ya's Out!, Hot Rocks and More Hot Rocks that I had been listening to for ages, growing up wondering what it was like in that world of 2000 Light Years From Home because it sounded so cool on headphones.
I bought Undercover when it came out because at the time I thought maybe Doo Doo Doo Doo would be on it - I had no idea what the song was called at the time. I loved Undercover and still do - and after I figured out what album it was on, I got Goats Head Soup next.
I enjoyed that one for quite a while.
So I think that correct response to the subject is Undercover.