I've seen my fair share of rom-com anime. I don't watch a lot now because it feels like I'm watching the same anime over and over again. So many of these anime have the same overdone tropes.

•••Show/Loner guy and popular girl fall in love plot:

This is the most common plotline in all romance anime. The guy is either unpopular, a cynic, or a •••Show. Despite having little to no redeeming qualities, he somehow gets the attention of the most beautiful and popular girl in the class/school.

Main girl is just a dere archetype:

The main girl is a dere (tsundere, kuudere, deredere etc.) and has nothing else to her character.

Another girl falls in love with MC:

Another girl (usually a childhood friend) falls in love with the MC. This leads to them competing with the main girl. This trope is really boring because we all know the main girl is gonna win anyway.

MC's best friend/•••Show friend group:

Doesn't do anything except talk about how "lucky" the MC is for having a beautiful girl/girls around him.

Main couple clearly like each other, but don't confess until the end of the season:

For some reason, the main couple makes it their mission to delay their confession until the very end. Sometimes, they won't even confess in the first season. This really sucks because a lot of the time, these anime won't get a second season.

Basic harem plotline:

It's usually going to be about 3-5 girls who are friends or related in some way. Also, each girl is a dere archetype. They usually hate the MC at first, too. The MC met one of the girls in the past, but doesn't know what she looks like now. The plot follows the MC getting to know each girl and their struggles as they fall in love. The girl who wins ends up being the girl that the MC met in the past.

Random dudes on the street talking about how good-looking the main girl is:

This is common in Rent-A-Girlfriend. Dudes on the street will usually make a comment to their buddy like "Wow, she is so hot!" If the MC is with her, they'll say "What's a •••Show like him doing with her!?" Doesn't have to be on the street. Could be in school as well

Firework festival episode:

High tension episode that ends in someone confessing. The other person doesn't hear because a firework exploded at the exact time the confession was made. After the other person says "What did you say?", the person who confessed gets embarrased and takes back their confession.

Sick day episode:

One person in the main couple gets sick. The other person goes to their house to take care of them.

Beach Episode:

Main couple decided to go to the beach with some friends. Main girl spends time picking out her swimsuit. MC spends time fantasizing about the main girl being in a swimsuit. While at the beach, the main girl gets approached by dudes who don't know what "no" means. MC comes in to save her. Douchebags leave while saying something like "This guys is a •••Show. Cmon, let's get out of here."

The anime only has one unique thing about it:

A lot of these anime will use some sort of shtick to stand out. For example, the shtick of More than a married couple but not lovers is that the main couple had to get "married" for a school assignment. Other than that, there is nothing unique about the anime.

Those are all of the tropes that I can remember. Did I miss some?