1) People who just don't get common courtesy or common decency...you know the ones who don't even think about how their actions are affecting others...most of the list below really falls under this...
2) People who talk or text or do anything but sit quietly during a movie...yes, you can laugh at the funny parts, but I really don't need to hear you say "oh did you see her do that?" to your friend next to you...they are sitting next to you watching the same movie. I pretty much can't go to the theater any more because it's insane.
2b) People who bring 6-year-olds to R-rated movies because they suck as parents and are too lazy to get a baby-sitter.
3) People who park across several parking spots to protect what they believe to be the most whack fo' shizzle car out there.
4) People who won't wait in a line of cars waiting to turn left, so they pull out, go all the way down the right lane, then stop to try to get back into the left lane...stopping the right lane in the process (this is an epidemic where I live).
5) People who turn left from the right lane or right from the left lane.
6) People who feel the need to draw attention to themselves by driving overly pimped out cars, turning their bass up to brick-cracking levels, wearing stupid clothing, or just being loud and obnoxious.
7) People who feel the need to yell things like "SPRING BREAK 2009 WOOOOOOOOO!!!" while holding up the "fist of rock". I don't get it.
8) Anybody who practices political correctness or enforces "zero tolerance" policies.
9) People who refuse to think or learn and just rely on everyone else to pull them through.
10) Bad spelling or grammar. I just can't stand it. Even on internet forums (I await someone pointing out a mistake on this post, as I'm sure there is one

)
11) People who wait in line at a busy restaurant, then get up to the order-taker and say "Hmmm...what do I want? Let me look...Hmmmmm"
12) People who speed and weave in and out of cars during heavy traffic. I drive fast, but I also know when to slow down and go with traffic.
13) People who talk a big game but can't back it up, or just say random crap to make themselves sound intelligent.
14) Any scam artist or fraudster...
15) Chewing gum with an open mouth...smacking it. Drives me NUTS.
16) People who never put their cell phone down, even while ordering at a restaurant, checking out at the store, or eating. If you are conducting world-changing business, then fine. If you talk all day long just because you can...stop it.
16b) Those jocky guys who answer their phones in public areas and talk at the top of their lungs..."Look how important I am!"
17) People who can't go 30 seconds without their iPod in their ear.
18) People who constantly creep forward at a stoplight until they are almost in the intersection, then don't go when the light turns green.
19) Any one, at any time, who uses "text speak" in IMs or email. r u going 2 b there? I HATE HATE HATE HATE HATE that. I even see "u" in professional communication and it makes me want to vomit.
20) Cheaters and people who sail through life by beating the system (no it's not because I'm jealous, it's because I hate lazy people with no ethics)
21) People who always want stuff for free when what they want is nowhere near free.
22) People who blame others for their own mistakes (like people who took mortgages that they could never afford and blame the banks for giving them to them)
23) Frivolous lawsuits.
23) People in general.