Reading around, it seems tags are not really considered an important feature, but something "made for beginners." They're bad because they're "string-based coding" and so on. We should "use polymorphism."

So, what do we do?

My thought is:

• Create a static class singleton that has a dictionary
• For GameObjects, in Start, add a function that registers them in the dictionary
• Also add something to OnDestroy that takes them out of the dictionary

I don't know, I've heard people say static dictionaries are bad, plus that looks like it might cause trouble with quick scene reload. I haven't tested if I can do this yet, either.

Sample use cases might be: AOE water attack that only hurts fire creatures and also puts out fires; gathering cooking ingredients that could be all sorts of things

I'm new to C# and Unity, (just finished the Head First C# book a little while ago), so a detailed answer would be nice.