I have recently been admitted to a few PhD programs, and have to decide where to attend. One of them has a massively famous professor (over 50k citations, 'Reuters Highly Cited Researcher'). Other potential supervisors at other institutions are still quite famous (~15k citations). Could anyone share some potential differences in my experiences if I work with someone who is that famous, or not? The group sizes/number of current students are all comparable.
I knew somebody who started a PhD with a super-rockstar in Computer Science. He told me he met with his advisor thrice in a year or so, once (a short meeting) when defining the thesis topic, once crossed him in a hallway, and came across him at a conference. It turns out the rockstar was on the road almost 24/7. He changed to a not-so-famous advisor, and was much happier.