Anything wrong with requesting an in person interview rather than over a phone call?

[HYHY02]

Hey everyone,

I had an interview with a potential PhD supervisor about a month ago in person that I felt went well. I personally want to follow up that interview with another one, to ask a few more questions and get a better idea of the potential research. I know this reeks of paranoia, but do you guys think there is anything wrong with requesting to meet in person rather than speaking over the phone if the interview firsts suggest to talk over the phone? I mean to me, it's not a big deal, but you never know.