In my opinion, the ideal opening setup depends on what it is you are going up against (an obvious answer to an obvious question): And style of (logic)

However, after saying that, I've been analyzing game plans from the squares you decide to put your pieces on.....

for example (pawn structures and attacking moves):
1 move deep: which is better e4 or d4?
2 moves deep: which is better e4, d3 or d4, e3?
3 moves deep: which is better e4, d3, f4 or d4, e3, c5?

1 move deep: KP offers excellent attacking chances! Opens up 2 pieces in 1 move.
2 moves deep: d4, e3 is better protected and the queen is less restricted (Qf3 - for example controls more squares)
3 moves deep: it depends, are we going up against symetrical KP and can we open up the F-file for an aggresive and effiecent attack after casteling king-side with tempo? Or the other Structure seems to be better because of Queen Mobility!

Is the knight better developed on c3 to block the check, and possibly threaten the enemy king in 2 jumps from that square, or is it better to develop the other knight first to f3, which blocks the queen, but is nicely protected.

Or here is another idea: fienchetto the bishop for a long range (safe) pin and early attack? Or go for the more Mobilized position, coordinating with other pieces in an attack on f7 for example?

To answer this, I am going to give my opinion of certain openings and why I feel that they are better (generally speaking), but would also like to hear your opinions.

I like the Vienna Gambit. as White.
Against all other openings = Undecided.

Here is why i like the Vienna (in-depth)..... 1. e4 (Aggressive), .... e5, 2. Nc3 (I like this plan of attack better than Nf3 for example because Nf3 would block the f-pawn and Nc3 blocks the check after the d-pawn is pushed, and Nc3 threatens his king (in just 2 jumps), Protects the weak pawn at e4, and here is my Primary Reason, Prepares for f4! (threatening to capture, rather than just be a target on that square because after fxe5..... Qh4+, g3, the queen can not capture e4 because it is protected! 2.... Nf6 (most natural responce), 3. f4! And now, if exf4, e5! followed by developing more agressively (with tempo) and recapturing the F-pawn at my convience, with a nice open file for my Rook.... the book move is 3.... d5 And then fxe5 threatens the knight on f3 and opens up the file for the rook, followed by Nxe4, Qf3, f5, and my analyisis is done (I Prefer White because of the e pawn which could later queen, and should be protected ASAP. but in reality, the position is just really starting to be complex. Other possibilites are instead of f5, to play Nxc3 or even Nc6. but, i still prefer white.

interesting line! It is called Vienna Gambit (C29 ).
I used to play this line in my early age.
Here are some games from my collection.

The first one is between Steinitz vs. Gustav. In this game Steinitz was at his best.

[Event "Baden Baden op"]
[Site "Baden Baden op"]
[Date "1870.??.??"]
[EventDate "?"]
[Round "?"]
[Result "1-0"]
[White "Wilhelm Steinitz"]
[Black "Gustav Richard Neumann"]
[ECO "C29"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "45"]

1.e4 e5 2.Nc3 Nf6 3.f4 d5 4.d3 dxe4 5.fxe5 Ng4 6.Nxe4 Nxe5
7.d4 Ng6 8.Nf3 Qe7 9.Bd3 f5 10.Bg5 Qe6 11.O-O fxe4 12.Bxe4 Bd6
13.Ne5 Bxe5 14.dxe5 Nd7 15.Qh5 Nf8 16.Rad1 Bd7 17.h3 Rg8
18.Kh1 Qb6 19.e6 Bxe6 20.Rd2 a5 21.b3 a4 22.Rfd1 Bd7 23.Rxd7
1-0


[Event "Mannheim"]
[Site "Mannheim"]
[Date "1914.??.??"]
[EventDate "?"]
[Round "?"]
[Result "1-0"]
[White "Rudolf Spielmann"]
[Black "Alexander Flamberg"]
[ECO "C29"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "29"]

1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Nf3 Bg4 6. Qe2
Nc5 7. d4 Bxf3 8. Qxf3 Qh4+ 9. g3 Qxd4 10. Be3 Qxe5 11. O-O-O
c6 12. Nxd5 cxd5 13. Rxd5 Qe6 14. Bc4 Qe4 15. Bxc5 1-0

Hope you will enjoy these games.

The massive database online is Chesslive.de.
To study the above opening go to the site and enter the moves.
To properly use the site, study the games of the GMs.
Reject the garbage games, which are at the end:
Online games, postal games, European Children tournaments.
If the database shows 2000 games, and you want newer games go to
advanced settings and change the start and end year. (Such as 2001 to 2007).
To download games use your mouse. Next to the game(s) mark an asterik,
by clicking your mouse. DO NOT TRY TO DOWNLOAD a whole lot of games or you will get a crash. Do about 50 games at a time.

Another site: Chessgames.com. You can download entire collections, but you must be a paid up member. The cost is reasonable.