For me a base location is dictated by biome placement.

Black forest with many copper nodes to set up for bronze,
After that I look for a black forest copper node near a large swamp with crypts and /or mountain with silver.

Normally around Iron I am ready to set up a portal hub base that may end up being my main base in the black forest near a swamp.

But if I find a Maypole I will set up a sleeping/resting base around it.

In the end though there are no "best" it really comes down to what you feel like. I have had main bases in all the biomes and each offers their own unique environments to enjoy.