I really like the favorite/boost/bookmark distinctions. I also like the fact that here you have to go back to the original post to talk--my brain says lovechild of Twitter and Pillowfort. Also, accountability, woohoo!

So. In my view.

Favorite: HEY YOU this was a COOL THING.

Boost: HEY EVERYONE this was a COOL THING.

Bookmark: HEY ME don't forget about this COOL THING.

Reply: OMG WHAT A COOL THING can we TALK about it?

@tryslora how do I bookmark. Sorry I’m new.
@Jujabee It's the little icon to the right of the star. When you click that, it gets added to your bookmarks which are listed on your getting started page (the one that opens from the three bars on the far left at the top of your far left panel). I've only just discovered them recently myself, and they are great for my goldfish brain!
@tryslora @Jujabee I wonder why I don’t have that option.