Picked up Theme Hospital yesterday as it was on sale on GOG for $1.50 and I hadn't played it since the 90s. This game has not aged well. All doctors are men and all nurses are women? Even for 1997 this seems like an unacceptably sexist oversight.
Even in terms of pure gameplay I don't think this has held up. It becomes very repetitive after a while and the (funny) humour isn't enough to make up for it. The receptionist giving continual announcements becomes very annoying very quickly, and there are about five music tracks which play on repeat and become tiresome to hear.
For an encore, see if you can endure the difficulty of Theme Park.