The relay explorer alpha can read and post from a single relay. It's fun to read the streams on smaller or topic specific relays, it's more of a community feel. Example explorer:

https://relay.tools/posts?relay=nrelay1qqw8wumn8ghj76r0w3exjemgw3hx7aewdehhxarjxyhxxmmd64ack9

There is also a directory for discovering new relays of any types.

Given that relays don't get scraped and rebroadcasted this could provide a bit of soloing your posts without having to run 10x the pubkeys just to have an opinion on 10 things.