I suppose that you need at least the most economical aircraft which is capable of doing the job which you need to have done. Buying less may leave the job in complete, or unsafety done. Buying more justs costs more than you needed to spend.
My only critsizm of aircraft ownership comes when the owner buys the wrong plane for the job, and tries the job anyway, which can result in an unsafe condition, or buys more airplane than they will afford to maintain, and then does not maintain it properly, which does cause an unsafe condition.
Other than that, own what you like, maintain it properly, and fly it safely and regularly. Who can critsize that? I'm an expert at being the butt of aircraft jokes. I've flown my C150 more than 2500 hours in the last 21 years. I would not sell it for 4 times what I paid for it! All that fun, and good investment too!
Pilot DAR