What are good openings?

What are some good chess openings? Name the ones that you use the most!

(Should be the first move in the game)

I don't think that you should be worrying about openings too much as a 700 but generally I suggest 1. e4 as white and to play 1... e5 as black against 1. e4.

It is important to note that openings are not just separated by one move, they are an entire phase of the game. If you didn't know, there are three very important phases of the game.
They are:
The Opening
The Middlegame
The Endgame
At your level, I would focus on basic endgames rather than openings. They help more in the long-run. 
Just my two cents.

What is viewed as a good opening is really dependent on your ELO.

At the club level and below you will get literally the kitchen sink played against you. If you chase an opening for an advantage you will get frustrated. (No one will play the book lines... cause they don't understand or know them) DO NOT listen to the crowed who cites only play main line openings played by the top tier GMs. These openings are usually very complex & lead to very sharp positions. (this fact might tempt you to think... well I'll just memorize some lines and burn my opponent when he/she deviates.. LOL doesn't work that way. 

below 1500 elo (and that's where I am at) There is an overwhelming % You will never reach 6 or more moves deep in tyour openings without the opponent playing a move that is not part of it.

What wins games is solid tactics and strong chess vision (where your see a couple moves out ahead of your opponent) and a solid endgame technique... NOT CHASING OPENING ADVANTAGES. 

Pick an opening that is hard for Black to F#%K with. Meaning "to pull you out of the position in which you understand"

One Example; The Colle (Zuckertort or Koltanowski... doesn't matter) Black can play the Anti-Colle... The main line, or a hypermodern defense (in this case a Queens and King Indian ) And Gambits are easily thwarted by ignoring the gambit'ed pawn and simple standard development. (this is why this opening is popular at the club level.) It's really hard for Black to pull you out of your game.

The Colle is just one example, there are others. the London, the Torre, the Trompowsky, the Kings Indian Attack, The Stonewall Attack (I know I'm missing some) None of these can be refuted, and all these can be played all the way up to 2500+ elo. check out Vladimer Kovacevic Auther Yusupov... 

I don't know of a mainline (Ruy Lopez, Kings Indian Defense, Queens Gambit etc ) where Black does not equalize...(or come real close) and that's what the detractors of the openings I'm citing will say as the reason "why " you shouldn't play those ... I.e. They lead to equality, or they will cite, they are simple or they lack depth in creativity.. lol ... The Colle on Wikipedia, look at the model game (O"Hanlon dominated Irish Chess... was considered their top player for years)

There are different types of opening advantages ... theoretical or familiarity just to name a few & there are different types of equal positions, statics and dynamic..

My best advise is not to chase an opening advantage.

a :

Tata Steel Chess 2024 - YouTube there is a tournament with lots of strong GMs and in short all the openings they will play or have played are good or good enough.

b : As "the best troll opening" IMO it's Hippopotamus Defence - Wikipedia (that can also be played with White) and this opening also serves as an anti-computer technique that Nakamura used against bots from Komodo Hikaru Nakamura vs Komodo: Blitz and Rapid Chess Match (youtube.com)

c :  Against bots when we have White, the openings that cause us more problems are IMO :

1 : for ex 1) d4 d5 2) c4 e6 3) Nc3 Nf6 4) Nf3 c5 and in short Tarrasch Defense, Ragozin Defense, Austrian Defense, can also be Nimzo-Indian Defence (what they have in common is the c5 thrust "giving a center under tension")

2 : 1) d4 Nf6 2) c4 c5 3) d5 b5

3 : 1) d4 Nf6 2) c4 g6 3) Nc3 d5 

4 : on 1) e4 of course 1)...c5 and 1)...e5 but as an opening that may not seem good it is I think Alekhine's Defence the worst one that causes us problems.

i mean this would have been for beginners trying to know what to play in an opening but if it was for me it would be midgame...

Because i tend to screw up during midgame

Try Smith Morra Gambit against Sicilian https://youtu.be/lF1AclkCrk4?si=9_ADi9fVkujh0Wiu

I like the Réti opening because most people can't think with the knight and how it moves. For black, whatever is the best way to win against wight.

I like the Caro Kann opening

Your only task in the opening is to reach a middle-game position in which you feel comfortable and confident. Whatever initial sequence of moves gets you there, is the best opening for you.

I prefer Queen's Gambit with white and Caro-Kann with Black

I agree with this idea.

here is a simple analogy to possibly help visualize it. you are standing next to a river with a Kayak. where you decide to push off into the river is the opening. the middle game is the river. it can be slow and steady or have rocks and even white water. your job is to identify the dangers, keep the Kayak upright, and land your vessel. prior to landing the Kayak you have to start looking for your exit point. this is the endgame. where you decide to exit the river determines how hard of a walk you will have to the truck.