King pawn openings: more aggressive, tactical, unbalanced.
d4 is better when a draw is enough or the opponent strong and unpredictable.
c4 the same, if one is ready to transpose.
Personnal preferences, of course; opening preference is mostly a question of taste. I don't remember which GM said "d4 and you may resign".
That's awesome!
D4 and you may resign, love it!
I have tried it a few times, D4, that is, but haven't finished those games yet, not so sure if i can handle it quite yet.
What do you think about 1- BKnight to C3, and then 2 - D4?
1. Nc3 followed by d4?
Not played often, I suppose because generally on Qp openings you want to be able to move your c pawn before the the knigt.
But maybe a future trend, say the "persian opening"?
ha ha! come come!
Well, i actually tried it in a couple of games, and was not very pleased for the same reasons as you mentioned. So, no thank you, no trends like this under my name 
Ι said the Persian opening, not the Persian's opening 
Same, same
Well, who knows, maybe i will come up with my own trend! i have a wonderfully wise instructor 
and i am a hard working pupil
Greetings,
Which is your favourite opening strategy and why do you like it so much?
To be quite honest, i like the old school King's Pawn Opening because that's the only one strategy i think i know what i should do next. I do try other kinds, but i feel a fear in my heart when i do so, but not with the King's Opening, with this, i feel strong!
Cheers and have a happy time,
totoo