A long time ago I adopted the Jinx’s Rating For All Things system and it’s served me very well. It is very similar to OPs suggestion.

• ⭐️⭐️⭐️⭐️⭐️: This thing is core to who I am. I don’t want to live in a world without it. The experience was life changing.
• ⭐️⭐️⭐️⭐️: I really like this thing! This will be in my rotation for along time. I had an amazing time!
• ⭐️⭐️⭐️: I like it. Perfect in the background. If it’s on, I probably will watch/listen, but I probably won’t seek it out. Inoffensive. This meets but doesn’t exceed my expectations.
• ⭐️⭐️: Not my thing, but I see why people like it. It has value, just not to me. I was slightly annoyed.
• ⭐️: Why would anyone like this thing?!?!?!?

I personally think the 5-star rating system is perfect. Any more than that and a lot of the mid-tier ratings become arbitrary and everything is subject to immediacy bias. Tastes change over time and how much you like stuff changes, but I’ve found that they rarely change buckets in this system.

I don’t understand why someone cares if they like one thing “just a little bit more” than another. It doesn’t have to be a competition. Do you like it or do you love it? Is it core to understanding you as a person? Did you have an amazing time?

I mean, you can, or you can use it to assure your firewall is configured correctly. The entire Internet is scanning you at all times, why would you focus your attention on one of the services who is willing to share their results with you?

Believe me, you probably have lower hanging fruit to pick.

That is a good looking model!