For me, it's Robert Killebrew the last two years.  No question that I dread his unnecessary roughness call each game that keeps drives alive.  What's worse is that I grew to expect it.  Combine that with his general suckiness, and I cringed the last two seasons each time he came into the game....

Up until the Nebraska game it was Jamaal Charles, but after it was Colt McCoy because before every snap I was nervous he was going to turn the ball over.

it was Big Henry.  I would scream every time we got near the goal line and he would pussy-foot into the hole or try to bust it outside.  I think he cost me a week of my life due to high blood pressure.  This years was Mr. Jackson.  Every time someone threw a deep ball I just closed my eyes and prayed.

Bobino.  I've never seen anybody blitz that much, miss so many people, and record absolutely no sacks.

Honorable Mention to Joey Wright, who never met a jumper he couldn't miss and was terminally allergic to defense.  But, of course, that dates me, and I'm sure to hear it from Shake and BigTexBD.

PB, in honor of your obviously l33t photoshop skillz, this is for you:
http://lifehacker.com/346828/suck-le...

As a K-State fan, I know I'm not allowed to participate in a UT pinata-fest, but I wanted to make a comment on Peter's selection of Dusty Mangum.  There has never been a Longhorn player I hated more than Mangum.  At the game in Manhattan in 2002, he came out of the locker room early (practically alone) at halftime, went to his sideline, and started kicking field goals over our band.  Damnedest thing I ever saw.

Then of course the little bastard had to go and make a big GD FG to win the game.

He hit one big shot (OU in 2003) his entire career and went 10-25 with 10 turnovers against Nevada in his last game.

...yes, that Mike Williams from the basketball team.

I was one of his biggest supporters, helped lead the "Free Mike Williams" chants in the O-zone, and told everyone how much I thought he could contribute to the team...

One night, I was going to play an IM basketball game in Gregory, and Mike Williams comes up from behind me and tries to take my gym bag from me.  After I wouldn't let go of it, he started walking around me in circles as I kept trying to move forward.  Really annoyed, I stopped moving, put my bag down, and said, "Mike, what the hell are you doing?  What do you want? I'm just trying to get to an IM game."  
Ignoring my query, he kept walking around me, cocking his head, making strange noises, and essentially gave an impression highly similar to the Velociraptors from Jurassic Park.  Next, he made a few pokes at my bag, got down in a duckwalk, and started waving his arms around.  After a few more seconds, he walked away, and I turned to see him give LaMarcus Aldridge a high-five.  I picked up my bag and went into the gym...

After that, I refused to cheer for him the rest of his pathetic career...my parents said there was a video clip in one game of the entire student section going berserk after he scored a lay-up, while I was standing there with my arms crossed and rolling my eyes.  

I was really glad he left Texas...

I still blame him for everything bad in every game.  It really is his fault.  All of it.

you spend enough time around someone and you just can't stand em
him and darrold williamson (from baylor) used to braid each other's hair

J.D. Lewis.  When's the last time he contributed in any capacity, besides letting a guard rest for 30 seconds?

easy tie for first: Scott Derry

but my pick is Joe Walker.  For those who don't know he was a CB in the mid to late 90's.  I was in high school, and all I remember is that his man always wide open.  That guy got burnt consistently.  Very frustrating.

Was Major's great hope before anyone had even heard of Roy Williams...  and he just plain pissed me off.  I've had a few cocktails between the time he played and 2008 and most of his instances of stupidity elude me.  However, getting suspended before the 2000 Cotton Bowl and watching us lose to Arkansas was AWESOME.

Watching Kwame become the first under Mack to declare early for the Draft...  and not get drafted: Awesomer.

i have no idea why.  completely irrational.  if i had to pinpoint when it happened, i think it was when i was standing next to him at Sonic and realized that there was no way he was 6'10" (his listed height).  this pissed me off for some reason.  i have no idea why.  i wasn't even drunk.

might be shocking but its... MARCUS GRIFFIN.

I have never seen a guy take so many bad angles on tackles.  Really, he would overrun so many plays and always get caught trying to chase down a guy and he just didn't have the speed to do that.

That coupled with the fact that his brother was one of my all-time favorite players and Marcus looked like Michael, just absent the total dominance.

1.  Geigger for "Roughing the Kicker"

2.  Selvin for just never making a big play, and always running into his blockers and piles of defenders.. and then for kicking ass in the pro's and showing us that he was actually good even though we only saw it in his first year before the ACL Tear.

3.  Melton for obvious reasons.  Mainly for not being able to ever get a third or fourth and one.  I blame him for not getting the first down in the K-State game where Colt wend down the next play.  I also blame him for not getting the fourth and one in the 12-7 A&M game on the opening drive. Can somebody please tell me that his eligibility is done?