This. I would like to know of the roll only if it was a successful one. Otherwise, you fall into metagame trying your luck with every character and animal companion in your party, it's ugly to see. If I failed to notice something why should I be able to call all of my pals to make them do the same check?
Depends on what rolls you are talking about - if you are wandering around areas then I think it's only fair that everyone in the party makes a roll to see if they notice something, its not as if the guy with the highest perception is going to be the only one trying to aware of their surroundings especially in somewhere dangerous. In fact, I wouldn't mind if you got a roll each time you passed the area given that your equipment/skills might have changed in the meantime.
I'm not saying just one player should do the check. I'm saying that if I'm exploring solo with, let's say, Astarion in stealth mode, I don't want to see if I fail a perception check. Because the moment I see the bad roll I know there is something there, even if Astarion noticed nothing at all. This means that, even if there are no In-game reasons to do so, I will bring every single character in my party to that same spot to exploit their perception checks, and this is called meta-gaming.
