YOU SAID:
John is a man with many interests
INTO JAPANESE
ジョンは多くの興味を持っている人です
BACK INTO ENGLISH
John is a person with a lot of interest
INTO JAPANESE
ジョンはとても興味のある人です
BACK INTO ENGLISH
John is a very interested person
INTO JAPANESE
ジョンはとても興味のある人です
BACK INTO ENGLISH
John is a very interested person
That didn't even make that much sense in English.