idk, I am 1000 rapid and 2500 puzzle and I think it is pretty impressive already
What is an impressive puzzle rating?

Just reached 1000. I know its not that high, but i am on free membership and only get 3 puzzles a day.
What puzzle rating is impressive?
Puzzles rating is inflated to game ratings by a few hundred points, so an "impressive" puzzles rating would be relative to their game ratings. If you are rated 1000 chess.com rapid rating, then maybe 1500+ puzzles rating would be impressive. If you are rated 1500 chess.com rapid rating, then maybe 2000+ puzzles rating would be impressive.
I'm simplifying of course, but the idea is that what is "impressive" to one person might be just "meh" to another person. That is why it is important to not compare yourself to others; compare your ratings to your past ratings and celebrate all the little milestones on your chess journey!

otb rating matters @KeSetoKaiba
When did I say it did, or didn't?
OTB rating "matters" more than online ratings to most people, but even OTB ratings don't really "matter" as much as sometimes we feel like they do.

Just reached 1000. I know its not that high, but i am on free membership and only get 3 puzzles a day.
What puzzle rating is impressive?
Puzzles rating is inflated to game ratings by a few hundred points, so an "impressive" puzzles rating would be relative to their game ratings. If you are rated 1000 chess.com rapid rating, then maybe 1500+ puzzles rating would be impressive. If you are rated 1500 chess.com rapid rating, then maybe 2000+ puzzles rating would be impressive.
I'm simplifying of course, but the idea is that what is "impressive" to one person might be just "meh" to another person. That is why it is important to not compare yourself to others; compare your ratings to your past ratings and celebrate all the little milestones on your chess journey!
Maybe 1200 or more.
Calculation is vital. Enjoyable, too.