Black always has 4...Bb6 which seems loads more practical. Will the queenside pawns lead to an improved Italian game? This can be played out without memorising lines and tactics you'd never see otherwise. Still 4.b4 looks like fun.
Anyway 1900 isn't the point where Vienna games, king's gambits, and Scotch gambits stop working as far as I know. I remember reading about how Dvoretsky(?) played the four knights scotch into his 2000s.
I remember reading about how Dvoretsky(?) played the four knights scotch into his 2000s.
Mhmm, but the Four Knights Scotch isn't really tactically risky.
How about this high-level, 27-move victory with the Scotch Gambit? (I wouldn't want to be on the receiving end of this! 
)
I wonder why he didn't go for 11...Ba6.
When someone wins in 27 moves, the loser must have contributed.
The Ponziani of course with a higher win percentage than the Ruy Lopez.
When someone wins in any number of moves the loser has contributed. 
KG or Evan's Gambit, either line is good, both are fun and both are agressive but hey I have been on a massive blunder streak so don't trust me completely
Didnt Fischer bust the KG?
No
his "bust was just another defense, and he himself played the KG to pretty good effect so I would not claim it busted
he did write an article entitled "A bust to the King's gambit" but IMHO it was not very convincing (its good to know descriptive notation to read those old articles)
It's interesting to note that of the 10 KGAs (+8-1=1) Fischer played as White (per chessgames.com's db - 5 of which were simuls), 9 were the King's Bishop's Gambit which gives the impression that he considered the Bishop's Gambit sounder than the Knight's Gambit.
Maybe you're right, im not sure, but ive always heard he busted it.
Study it for yourself.
(hint -click the blue words)
Of course the king's gambit won't be refuted. Obviously black will need to make at least some concessions to hold that pawn, so losing the pawn isn't the end of the world for white. The better player (or perhaps in some cases the better prepared!) should still win.
As for the bust: Since not many people are confirming Fischer or even using his defense, I would imagine not all strong players are convinced. And only on that premise do I make my conclusion -- I am not one who can refute Fischer with my own move-by-move analysis!
Try Halloween and Cochrane, both lead to cool games 
Yep, yep. The Scotch Gambit has been and is high on my candidates list.
If you are looking into the scotch gambit then Roman Dzindzichashvilli made 3 videos about it on chess.com. Part 1 is called "Underrated openings part 1".
I would try some aggressive ideas like this after 1. e4 e5:
2. c4 (controls the light squares and can transpose into an English opening.)
2. d4 (idea is to break down the black's center.)
2.d3 (strengthens the e4 pawn and can lead to a kingside attack pawn formation.)
2. Nc3 (brings a piece into the action and controls centeral space in the center.)
Those are my suggestions. Personally, I like c4 the best because it allows a fight for both sides to control the critical d4 and d5 squares.
c4?! also ruins the d4 square
1.e4 e5 2.Ne2
or
1.e4 e5 2.c3
Why are you reluctant to play the Ruy Lopez? You already asked for help finding a line against it and you appear to have examined the Marshal, 3...f5 and the Breyer in considerable depths.
Why are you reluctant to play the Ruy Lopez? You already asked for help finding a line against it and you appear to have examined the Marshal, 3...f5 and the Breyer in considerable depths.
Honestly I'm not sure...
There is no point in offering advice to the OP. Everyone in the threads lately is like "Let's offer my opinion that will help him (not really him, but me!)"
Rarely do you ever get objectively good advice about openings. I don't see titled players offering their advice here, nor really (relatively) strong players doing the same. It's evident to me that you should find something comfortable for you.
I think I prefer black in the given position there. But then that's not surprising given my sytlistic choices.
At the moment, White's not really doing anything, but the eventual plan is a potentially dangerous f4-f5.