Mon ouverture favorite est-elle bonne ?

Is my favourite opening good ?

I'm not a good player. So for the moment, i don't use numerous opening you can see in the book.

As many beginners (that's what i think), i just try to control the center with prawns.

Then, my favourite opening is to do at least 1 big "3 rows" diagonal. However, this kind of opening isn't so popular and used, so i even didn't see the name of this opening in the web.

This is a typical exemple that how i open generally. Can you tell me advantages and especially disadvantages. Why it isn't so used by good players ?

Just below, i show you the most used reaction by my opponent and what game finally that make it play. Usually, my opponent refuse to take my prawn in d4 (if he does, i eat his prawn with my queen and then he attack my queen with his knife). Most of opponent prefer to not eat my prawns and use directly their knife in c6.

Just below, you can see the most common game my opponent decide to play with this kind of opening.

I would like to know because in low rating, this opening seems to work quite well (for me). But if it isn't so used by the good players, that mean it has to have many disadvantages if i play with high rating.

Whatever the defense, i can use this opening (even with sicilian defense, attacking c5 rather e5). Only with e4d5 defense, i can't use this strategy.

I think i use this opening nearly half of the time.

Thank you for your advices.

Pawn on f3 is not good. 

3...Cxe4 4.fxe4 Dh4+ risque de te poser des problèmes

Pourquoi donc ?

Cxe4

4. f3xe4...fxe4 --> fd2

4. f3xe4...Dh4 --> g2 (cette dernière possibilité me permet de monter chaque pion d'un cran).

Je vois pas le danger même s'il doit y en avoir un. Je suis trop exposé sur les cotés c'est ça ?

Merci.

Why it isn't ? My knife can go on e2 and develop in other way. It's not good to do like this ?

Thank you.

La diagonale h4-e1 est appelée "diagonale dangereuse"

Après 3...Cxe4 4.fxe4 Dh4+ 5.g3, les Noirs peuvent jouer 5...De4+ suivi de Dxh1.