I'm using kbin.social mostly, I will just follow Lemmy communities from kbin once federation is re-enabled. It doesn't make sense to me to have an account for Lemmy AND an account for kbin if they're both part of the Fediverse.
I am also using Mastodon, even though it's part of the Fediverse. I'm doing this because it's more like Twitter, and the tweet equivalent on Mastodon is the same as a "Microblog" on kbin.