Moves and Patterns to Define Players

What are the general patterns I can use to tell someone's actual rating?

I assume people that are newer have specific ways they do things versus someone experienced or an expert.

Here on chess.com ratings flow constantly and errors, disconnects, and general hullabloo make the ratings inconsisant sometimes. Also a person rated say 1600 or 500 in reality all starts at 1200 here on chess.com.

So I was wishing for some advanced players to comment as to tendencies, moves, and general style of play that gives someone at least a decent ballpark estimation of ratings.

Thanks for any help!

If they don't play an opening, they are sub-1200.

I'm sub-1200 and I play an opening

The Catalan, eh?  Which do you play as black?

Black it depends on what white tries to open with of course. I like to keep games closed or semi-open.

Yes Catalan, It's my favorite, I saw it one day and just knew it was my opening.

Depending on response by black it allows white to pressure the queenside making black have to open on the kingside and white does the same thing, I just it just to set up a scenario so the other person blunders eventually and I exploit that to the highest degree

You can't really generalize since each player has different strengths and weaknesses. A 1200 player could be there because they know no openings, they blunder in any position or they play passively hiding behind a locked pawn shield.

that being said this might be a general idea...

1200 -  dont know openings, often lose games by multiple large blunders (drop a rook, a queen, etc. to basic tactics.) knows elementary mates etc.

1400 - still blunders often, but has some basic opening experience, still weak in the endgame and middlegame strategy

1600 - a player who can see 3 ply correctly 99% of the time will be here. Probably knows more opening theory than they can handle with their middle and endgame skills.

1800 - Probably see 5 ply correctly in most positions, games are rarely decided by large material - errors still abound in middlegame, has some preparation against most openings. Endgames are still weak.

2000- Same tactically as 1800 but with better openings and transition to middle game. Games at this level begin to be decided by positional trumps like better minor pieces converting into material etc.

2200- Master's come in all types but generally they are tactically stronger than 2000, much sounder in the middlegame and at this level endgame play frequently decides the game.