Ponziani

Ah, yes. The Ponziani. It is SUCH an effective opening that I used to play it most of the time and win most of the time, but now I play the Scotch and it is not as effective : ( 

Having experience with this opening, I highly recommend it to beginners such as myself.

And one more question: Do you think players are better with more aggressive and powerful openings or openings that they are familiar with?

I think low Elo players like myself benefit from aggressive openings where there is a clear through line for the game. Example, target f7, opening up the king, attack until mate. That is why so many play Evans, Two Knights, the Italian and Scotch as white in general. Nice open positions where you can attack the king with simple plans. I don't play Ponziani as white or see it often as black even when I played 1...e5, so I suspect it has a good surprise factor to go with those plans.

I fail to see why you are so enthusiastic about the Ponziani.

You have played it here eight times, and you got three wins and five losses. And none of these results can be attributed to the opening- all of them were decided by huge blunders from either side.

Long story short, you tactical skills are lacking, and you have to focus on that- openings don't matter at all at your level.

With all due respect, I understand what you are trying to say, and I just wanted to remind you that chess isn't just played on this website. I play it in real life as well. Openings do matter, without them you wouldn't have a good game. Everybody isn't perfect at chess, and I learn every day, so maybe just be a bit more positive..?

I’m starting to play Ponziani more often

The ponziani is bad, it gives black an early advantage:

How come "it gives black an early advantage" after 5.d3?

This is a reversed Philidor with an odd ...f6 thrown in (also that Qa4 is odd, but it can get back at c2, while the pawn cannot go back). It is just a normal position with mutual chances.

I play 3...f5!? against it, with fun games & good results.

Not terribly inspiring. After 4.d4 fxe4 5.Nxe5 it is a reversed Vienna, where the extra tempo c2-c3 is certainly useful.

Sure, but for us mere mortals it works pretty well!

The Ponziani is a fun opening. Especially under 1500 where it almost gives a winning advantage regularly.

However, if black knows what he is doing he can even aim for an advantage after 3...d5.

For this reason, I would recommend that you try and pick a "lifetime" opening repertoire that may suit you during a longer period of time.

Yeah like the Bishops opening or perhaps the Scotch game