Is there a thread or forum that talks about...
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I understand that it depends on the sound that your looking for but Im confused on how to tell-if that makes sense.
Good and bad are entirely subjective terms. A good mic to one person might be one that captures the source with total accuracy... but someone else might think that is too sterile or flat, and might prefer a mic that flatters the source, or makes it sound larger, richer of fuller, for example.
Different mics have differnt characteristics, and the skill and art of recording sound is choosing nad placing mics in such a way that they deliver the kind oif sound you are after... whatever that may be.
Technical Editor, Sound On Sound