These days, signatures are becoming less and less legible. Speaking for myself, mine is still legible ONLY if I take my time and I'm writing on a 'low-tech' surface aka paper, cardboard, etc. These check-out machines have become the bane of my existence.
As far as collecting signatures, I only have experience collecting Baseball players' signatures, mostly on cards.
Of active players, there are a lot that look quite similar to my check-out samples.
Many Old-Timers had very 'neat' legible signatures, though some have aged just as the players themselves have.
My personal favorite was fashioned by, appropriately enough, 'The Mechanical Man' Charlie Gehringer.
Let's see your favorite!
1935 DIAMOND STARS w GEHRINGER AUTO.jpg