So, I finally went to a dentist that a couple people from work recommended.
Background: I have good teeth and have never had a cavity. A year ago I when I started my job I decided to opt into the cheapo dental insurance that pays for 2 preventive visits per year, and so I went to have a checkup/teeth cleaning. The problem with cheapo insurance I had was that nobody accepted it, so I found a nobody dentist and he said I had some 6-8 cavities. Not unbelievable because I hadn't been to the dentist in 5 years or so at that point. He showed me in a mirror how he could stick a pick into the side of my tooth.
I didn't like the nobody dentist (name is Faiz btw, Plano TX) and I was looking at a $1000 or more bill for that work, so I waited until I could change my insurance benefits and switched to the most expensive dental insurance, figuring I would get my money's worth this year and get my teeth all fixed up.
So I finally went to a different dentist (Dr Vale, Richardson TX) that had high reviews at work, and they did full Xrays and a cleaning, and then the dentist came in and looked at my teeth and mentioned that they could probably polish my front teeth if the discoloration bothered me (it doesn't). And then he said "You have great teeth. See you in 6mo for your next cleaning".
I was like, "wait, what about all my cavities" and he was like "what cavities?" and I was like "some other dentist said I had cavities, he even showed me how I had this giant cavity in by back tooth" and the new dentist was like "you have natural grooves in your back molars. If you were 8 years old I would recommend filling them for prevention, but I don't see any active decay there. You have a different small spot where there might be a cavity in the future (see it on the xray here) so we will label it as a "watch", but if you start flossing more it will probably be fine. I had a similar spot when I started dental school 20 years ago and it's never got worse and I've never filled it."
So, yeah. Choose your dentist wisely. If you live in DFW I think Dr. Vale is a pretty good guy. His office is also full of very cute and nice assistants.