I am 5‘ 10” tall and 11 stone 10 pounds (164 pounds) or 74 kg. I started on 5/8” as a learner skater, went to 1/2”, took skating lessons, went to 7/16” then 3/8”. I loved the grip and control with 3/8”, but it’s very tiring, and it’s hard to slide around. As my skating got better, I went back to 7/16”, then 1/2”, and now 5/8”. A 3/4” Sparx wheel is on its way to my home. I tried a 3/4” hollow done by my LHS, and thought it was great.
I discovered that a shallower hollower is faster and less tiring, and it makes it easier to slide around. But it requires better edge control i.e. a higher standard of skating. I can still do good crossover, 3 turns, crossrolls etc on a shallow hollow. This is thanks to several years of regular skating lessons.
I sharpen my skates every 3 hours, one pass on a Sparx machine, to ensure a consistent experience.