I have run into so many people like this. They approach my piano and tell me to play things...or describe how they want me to play something.
You know, some of us have friends who are guitarists. No need to get so personal!

I am kind of interested to know your opinion of why, besides the obvious reason (writing for/playing with transposing horns and reeds), it happened this way.
I know (or think I know) that a lot of the Tin Pan Alley songwriters were pianists, even if they just played "arranger piano," so simplicity of key signatures makes sense when it comes time to write out a leadsheet.
There are some standards in G (one sharp), maybe even more than in F (one flat), but beyond a few cases, which I'm drawing a blank on (and remembering I'm probably remember wrongly), obviously you're right: most standards seem to be in Eb, Cm, Dm, F, G, Bb, and maybe Ab.
I don't know that there's anything inherent in the geometry of the keyboard that makes Bb so much more "normal feeling" than A -- I picked those two keys because it seems to me there's an equal amount of blues playing in both keys, but in my non-scientific, non-anything survey, I think most players will go with Bb for just a blues tune, played solo, with no concern for whatever a horn player might do. Despite that all kinds of people can, do, and have absolutely killed it in A on blues, regardless if they were forced to by the bandleader, or whatever.
Or Db over D.
Guitarists will tell you stuff about playing higher on the neck and open strings for different keys, but aside from blues licks, where you get used to sliding from a black note to a white note, I'm really curious how it all got started.
Maybe it's just all myths, traditions, stories, all the way down, and I've heard plenty, but I wonder if anyone found anything more concrete to add.