I have a shitpost about this from a year and a half ago and honestly it's not all that much better. 

That said, some things have changed. You can now use WoT (Web of Trust) relays and some clients will also show you relays that your contacts are using.

But in the end it shouldn't matter as we all move to clients that support the Outbox model. You should be able to use any relay that you want and change often.