Great idea

I'm not the biggest chatter around (except when the blockchain is down, lol), so I'm mostly a lurker.

here's the list:

Team Possible Discord
Our Steemmonsters Guilds- and Fun Discord

Splinterlands
For obvious reasons :0)

PHC
An awesome bunch of people. I'm trying my best to participate in what's going on :0)

Steem Terminal
The place to be for newcomers. These guys do an awesome job helping people find their way on the Steem blockchain.

Mostly a lurker in there. I follow up on what's happening a couple of times a day, but I'm not really comfortable enough to engage full power.

In the last two weeks or so, I joined The Ramble, Innerblocks, Top3 Contest and Johndoer And Friends (home of the @doer-minnows project)
More lurking than participating for now, but like I said... it takes some time before I feel 'at home' enough to actually engage