Everyone has their own measurement of saying what's important.
Some go for the highest map you can complete, others say the highest you can FC, ...
There's people who value score, others PP, PPv2, TP, max # of SS, Highest quality SS(very impressive btw Winshley, respect), maps with all mods, ... you name it.
If you then consider the fact that there's 4 Osu-modes and that people even go for polyvalent rankings and such, you get the point that there's lots of possibilities =)
I'm not saying one is better than the other, I just like collecting SS' and would like to compare myself to other like-minded people.
Most I can find is Ryuu with currently 9591x SS