You almost sound like Alfred Barnes, the famous Pennsylvania-based collector of Impressionist work who also had very strong ideas about museums. Well, he certainly is one model. Peggy Guggenheim is another. There are a whole host of others. Eli Broad is one of the biggest collectors of Lichtenstein.
Art is one man's opinion.
Each individual is free to define it. We've always bought art we've liked. That sounds trite, but it's important because everyone will have an opinion. If you try and collect art by reaching a consensus of two or three people, you'll wind up with a collection that doesn't reflect you. It was not for resale.