Have you ever found out your best opening/defense?

Not me.

My best opening is London System for White and Vienna Gambit for Black...In that way...I got 1800+ rating in lichess...

But i can't afford to get 1500 in chess.com

Its so tough in Chess.com

My ID is LegendDargon2711 in Lichess

*LegendDragon2711

Yes I have

the english opening or kid

no, i don't know

I think its Scotch

Yes,I have

My best opening is Ruy Lopez

for me its the french defence,its just so solid

yes,i have

I'm 2000+ in rapid and bullet chess.com and I've always used the Ponziani. I generally like to go for e4, d4 and f4 if Black doesn't play in the centre. Whereas as Black, I haven't really studied much and just play spontaneously replying to e4 with e5, d4 with d5 and c4 with c5.

My favorite opening for white is the Four Knight Game (Italian Variation)

Black french

White King Indian