" I don't know why but when I get my ultra/super I tend to get lost and just try to do them than trying to win the game. "

I can only think of when I do a heavy shoryuken even though I know the other person is going to block.
I've been getting better at not doing it though.

" @TheLegendofLuke said:

" I don't know why but when I get my ultra/super I tend to get lost and just try to do them than trying to win the game. "

I am similar, but for me it's because I try to do it on my 360 controller, and it refuses to come out, so I spend the rest of the round yelling at my TV and trying to make it come out. "

L. Flash Kick on wakeup..

Not understanding half of the game.

forgetting combos mid match and losing

Having my hands feel screwed up after a few hours of playing causing me to not be able to do Down, Forward, Down, Forward, Ultras on the left side!!!

I use the heavy punch and kick buttons way to much.

Forgetting that Deejays Machine Gun Upper isn't an anti-air. 
 
I do it by mistake sometimes instead of up-kicks.  They just land right in front of me and wonder what I am shaking my fist about. =/  I am getting better about it though.

I mess up links 'cuz I'm pressing m . punch/kick after jabs too fast. A leftover from my MVC2 days I suppose.

" Inadvertently doing a 2nd QCF once I "Cannon Spike" to initiate a random Super when I have a full meter... "

I jump, man. I fucking jump all the time.
 
I only realised over the past two days playing ranked mode (which, if anything, has only made me worse), but its something I really need to break. If I'm too far away? Jump. If they're down? Jump. Basically, if they move, I jump. 
 
Need. to. stop.

Forgetting that I'm not using a charge character so at the start of the match, I press down-back to charge even if my character doesn't have a charge move... T_T

Joining games and loosing every time 

jumping in 
 being too teleport-happy with akuma 
smoking(seriously, i smoke like 2 times as much as normally do when i am entrenched in a SF session)

i practice combos all damn day and then play and forget everything i just practiced...brain fail

" i practice combos all damn day and then play and forget everything i just practiced...brain fail "

I automatically tend to crouch-parry at all times... even when I don't pick Guile (the only charge character I really play). 
This is of cause pretty punishable, because I'm not nearly as safe as I think. 
 
...Also my turtling ways tend to make me take more chip-damage than I'm usually aware of.

A big problem I have is that I don't know what my problems are against one player until it's too late. I also have a massive problem with the inability to Ultra to EX Yoga Flame. I don't even know why.
 Also, trying to do Seth combos with Akuma.

-Lack of comboing 
-WAAAAY too aggressive 
-Reliance on special moves 
-Using Ultras as a panic button 
-Playing while drunk (I am demonstrably worse and have less fun, but I still do it)

Apparently I'm random. Guess I should be more flowchart Blanka.

Too Defensive (which with akuma does not work apparently) 
can't combo worth anything 
LOSING ALOT 
and general suckyness 
 
I play this game a lot, yet still get my ass kicked by people who pick up the game for the first time. my pp is in the 400s.  I think i've played near 150 ranked matches. Yea, i'm that bad.

" Apparently I'm random. Guess I should be more flowchart Blanka. "

" I automatically tend to crouch-parry at all times... 

I don't anticipate, and don't know the counters to most of the stuff in the game, frankly. I get rocked because of it, unless the person on the other end is a total moron.

Punishing with throws instead of apeshit combos,

Forgetting I'm not invincible when I do Soul Satelite and continue to launch fireballs, hoping they'll jump to me but I instead eat an EX fireball or ultra. X.X

Not keeping my mind on doing what is right 100% of the time. I just need to focus on winning, not showing off. 

Overtly defensive with Ibuki... Always need to remind myself those shurikens don't do damage!
 
Jumping in too often.
 
Trying to slide under fireballs with regular ass neckbreakers when only EX neckbreaker actually does that.
 
And generally being lazy as hell... I don't remember an actual player match I ever did a proper combo since I don't practice enough. Usually stick to (jumping hp >) lp > mp > hp > neckbreaker, but even then I don't do it when I should.

I keep fucking focusing Akuma on wake-up when he has u1. Just blindly trying to bait the shoryu and not paying attention. Has happened like 10 times this week.

Random flashkick under pressure.
 
The worst one I have is ending Abel's combos with Falling Sky, try to buffer a QCF and I get a Shoryuken motion. 
That's why I play charge now.

Not bothering to learn combos or techniques. I need to take it to the next level.

Jumping in to sweeps. It gets too obvious for both sides.

Listening to podcasts while playing. 
 
HPPodcraft, Giantbomb, SRK...All of them screw up my game. Luckily, I only do this online. Offline is fo realz. 

I need to work on the whole "mind games" aspect. As a Hakan player, It's kinda important. 

My new worst habit is giving people too much respect. Online of course.

"If I win the first round of a fight fairly easy I get overconfident and get destroyed the next round. "