Playing the same opening for a long time

I personally do think that every player should look at almost every more or less sensible opening, maybe not in huge depth, but also not only for a hour or two. My point is that learning an opening nowadays means to learn not only moves, but also typical tactics arising from this openings and even more important, how to play the middle game with different structures and/or with different piece arrangements. This surely should be helpful to improve your chess understanding and by this your playing strength. Of course this isn't obligatory to become a good chess player, there are other ways to improve, but I would suggest it, if your ambitious and have some free time to spent.

I try to play random moves in the opening! Improving my positional prowess instead of relying on theory alone. It's an interesting take on handling the opening.

I have started playing one opening only. I found one that can be played in B and W and found that you have more intuitions in the middle game because you are familiar with the scheme and tactic. Of course I think in terms of rapid playing.

@IaJsKr I agree, but I've not come across a good resource that explains all this stuff.

"How to play the middle game with different pawn structures"

and "Typical tactics arising from the different pawn structures"

Does anyone know a good resource where all this is explained in simple terms?

@hampy
Those are valid questions, but give up looking for easy answers. It sounds more like a lifetime of studying to me. Do tons of tactics, play many games and study them. Only with experience you get a picture of what's typical and why

I think this question gets answered by studying the career of Capablanca. There is a popular youtuber who recently completed a very nice body of work recapping the games of "The Cuban". He played, at first (according to that stalwart annotator), without knowing opening theory. He operated on 'principles'. It really helped me understand the opening ideas.

#14 "My System" - Aaron Nimzovich

The London is a stodgy simplistic opening. It is the definition of rote. If you only play the London there is a world of middle game ideas and tactics that you will never run into or learn.
Admittedly it is solid, and easy to learn and play, but if you stick to it, there is a level beyond which you will not go.
As @IaJsKr says, a serious player should at least experiment with every type opening, get familiar with the whole world of chess.
Or maybe that's just my personal philosophy.
Magnus Carlsen said, "I want to know everything."

I think you should learn in depth one opening as white, and as black prepare for 1. e4 with something else than ...e5, so that you don't have to learn every e4 opening. Prepare for Queen's Gambit with a reply, and also learn a reply for 1. c4. Then you shouldn't come across any strange opening you no nothing about. But should this happen, just use the fundamental opening rules and you'll be fine!

#17 thanks for the tip about My System.

Reassess Your Chess
vs
My System

Which should be read first?