did not like sicilian wing gambit or the lousy pamplet (book my butt... half of it wasn't even wing gambit!) I bought to play it
i'll have to look into the "black mustang", I'm guessing you're using a slightly different name than I remember for the 1...Nc6 for everything system. dark knight system... different way to say the same thing it seems
if you hate the london, try the hartlaub/charlick! punish londons for pre-moving 2.Bf4?? after you 1...e5!? (!) like I said, I love that open tactical anti-pawn pushing EASY TO LEARN system.
if alekhine vexes you, try the underrated krejcik!
You have to be wary of a retreat for your queen sometimes, but often you can chase black all over the board constantly developing attacks on him. if nothing else, you've stolen his castle rights and boxed his rook in. I have won 6 out of 10 games with it plus a draw. I'm 67% in 2.e5 games too, but krejcik is funner. i like it when i can actually trip an opponent up positionally as I'm position challenged
i REALLY used to despise the nimzo as a 1400 getting stomped by 1200s against it, but now destroy it. i have won EVERY one of these games:
chasing and hobbling the knights seems effective followed by basic development and/or defense as needed. i'm just going by intuition here. no study. pushing whatever pawn you can push after d4 gains you space. THERE... I just talked positional for ONCE in my life! where's my effing gold star and smiley face stickers? LOL
Kings gambit- it's 2023 not 1823 too wild
Caro kann- feels more like a d4 opening when I play the exchange variation
Scandinavian as white- doesn't happen often enough to get good facing it
as a scandinavian player myself, NO ONE plays the blackmar diemer gambit (the unsound tennyson is the rage these days) I tried the 3.Nc3 varisation, even shared theory for a BRUTAL "ice queen" variation with 75% stats, but it just never clicked with ME. I do poorly in lines that play Nc3 or Nc6 1st. I'm doing just fine with the 3.f3 gedult variation though. THAT one gets accepted almost every time
"main line" modern scandinavian!
The wing: 1. e4 c5 2. b4 cxb4 3. a3 d5 boom wing refuted. You can thank me later.
i never have to face the london with my 1...e5!?
The only openings I hate are the sicilian if I am playing as white, and the Caro-Kann; Exchange variation.
You may think that at my level, I wouldn't be facing the Sicilian much, and you're right, I dont, but when I do, its a hassle. They even know the theory! Why are they doing this at 650 elo?!? How aren't they higher?!?
The caro kann exchange variation sucks because its SO BORING. Its not too bad though, black gets plenty of chances to break the symmetry.
whites attempt to play the fried liver is pain, it will never work! never!
Double-Fianchettos are the most-annoying
also true.. I once thought this was you can "refute" the double fianchetto but actually it's not possible to refute.. which is weird. you have to sweat to beat it
You would hate facing me with you as Black. I play 1.b4 and 1.g4 as White.
The opening I hate most, from either side, and avoid like the plague, is the Grunfeld!
the love fest's over! what are those openings and lines that you hate facing, or even having to play?
I hate facing almost EVERYTHING as black except 1.d4 now because I've finally found MY current favorite
englund hartlaub/charlick gambit 
hate having to "slav-wall"
hate the toothless marshall scandinavian
despite an actual winning record
I REALLY hate the french
after all the pummeling I took facing it as a 1400, and even now after over a decade of trying to find a working gambit (FORGET monte carlo! black won't allow it!) it IS so delicious crushing black in under 20, when I do in the alapin diemer gambit 
, but I still have a slightly losing record with even that
I can't stand trench weasel hypermoderns pirc, modern & owens
what lines drive you nuts?