Yeah, I hate that, too. I know foley artists usually work with a sound library, but come on guys! Sometimes it’s really obvious! The three most obvious cases I know are:
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That one loud, long scream that goes like:
“YEEEEEEAAAAAARRGHHAAAAAAAAAAaaaaaaaaaahhh…”
The first thing I heard this in was the computer game Star Wars: Dark Forces, and every time I hear it (which isn’t very often, thank God) I think of that game. It also sounds so damn silly, so I don’t know why they still use it.
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A lot of “hit reaction” sounds that I first heard in GoldenEye for N64 turn up in a lot of movies lately. I swear sometimes they even include the sounds of you hitting them.
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Whenever a screen door shuts, it almost always sounds exactly the same.
Other things that bug me:
When VCRs play the audio while rewinding a tape. This pisses me off so much because it’s obvious to anyone that VCRs never do that IRL.
When computers everywhere are always Macs. And new ones at that. Police departments don’t have brand new iMacs. They have 10-15 year old IBMs or Compaqs.
When computers have programs that either don’t really exist or have a really stupid user interface: usually media players, chat programs, or E-mail.
When computers either have no visable OS or GUI, or it’s a non-existant OS or GUI that makes no sense.
When people talk while they’re typing.
All the recent “MTV Editing Style” that’s in some movies since a few years ago (Romeo +Juliet, Blade). This includes breafly speeding up the frame rate for a moment (and it’s always done during the editing, so it looks really bad); lots of chaotic jump cuts, close ups, and zooms that are usually filmed at an angle; and lots and lots of music.
When people complain about product placement in movies that’s not really product placement. No wait, that’s in real life. Movie characters use brand-name products too, people!!
When the Internet is mentioned or part of a plot, it’s usually in a negative conotation, such as pornography, pedophiles, stalkers, or fraud (TV dramas do this a lot.) Don’t they know the real purpose of the Internet is for cat pictures? 
When the Odious Comic Relief isn’t killed.
Kids and animals never get hurt.
Movies that show hacking, but it’s always the flashy, Psychidelic GUI that would crash any PC kind of stuff, and never the boring, typing out lines of code on a plain black screen stuff.
Jokes and gags in movies that aren’t funny, but are just God damn gross. Also jokes that are gross for the sake of being gross. These are the worst. Hello, Hollywood: people often watch movies while they’re eating, you know!!
The “Miss Saigon Syndrome,” where ethnic characters (usually Asians, Mediteranians, Native Americans, Indians, and Latinos) are played by non-ethnic actors. This was especially true with Asian characters in older films.
A variation of the above I really hate is what I call “Ethnic Modernization”, where non-ethnic characters become ethnic for film versions of stories, just so everything can be politically correct. This usually happens for TV movies and mini-series.
When TV remotes click. Remotes have used soft buttons for years, so they don’t click anymore.
VCRs can be paused forever.
You never hear people say “I love you.” and then “I love you, too.” Even between a husband and wife, or a parent to their child. I can’t even name a moment when it does happen.
When people have sex, they’re either both single, engaged to or dating each other, or both or at least one of them is engaged/dating/married to someone other than the person they’re having sex with. You hardly ever see married couples having sex. This actually bothered a friend of mine quite a bit.
All movie teenagers seem to have sex all the time.
When apartments or (especially) dorms are always way too big. Having a dorm room that’s 25x25 feet (often for only 1-2 people!!) is completely insane.
Also when dorm rooms or teenager’s rooms are always messy, with clothes and junk everywhere (there’s almost always a guitar, too) and with walls that are covered with posters and maganize crap that you can’t see the wall paper. Don’t forget the 24-hour rock/metal/pop music playing in the background, and that the bed is usually a bunk-bed even though they live alone.
When they show video games (mostly on TV: and they never actually show gameplay on screen) it’s usually with all those shitty “video game” noises that games haven’t made since 1985, or never at all. Also when they show controllers, When they’re not first party PlayStation, SNES, or Nintendo 64 controllers, they’re usually third party controllers of the previous, and often don’t match up with the system (when they show it). I once saw Sony PlayStation controllers with a Sega Saturn system on Suddenly Susan. Most of the above is void when the system is Product Placement (X-Box on Will and Grace, or Super NES on Rosanne), except for the shitty game sounds.
To follow the above (also mostly TV) is when people playing games play like 4-year-old kids: frantically mashing the buttons like mad. Doesn’t matter if it’s a tournament fighter, racing, or an RPG, it’s always played by blindly mashing buttons. No real game exist where you play like that. Also when the games are totally made up, whose plot or action is usualy derived from retarded comments by the players. Best example is Rosanne with “Two more swords and I’m queen of the monkey people.” (add to the fact that the audio was obviously from Super Mario World).
I swear the only truely faithful representation of a video game on TV was that one episode of Mr. Belvedere where they had a pinball machine.
Another mostly TV one. When people are watching TV shows (applies mostly to cartoons) they’re all sound and no dialogue!! For cartoons they always have these retarded sound effects playing constanly, making the show sound like a chaotic mess of gags and nothing else. It’s always WB-type cartoons with no plots, too. No TV kid seems to watch anything like the Smurfs, Teenage Mutant Ninja Turtles, Muppet Babies, or anything else. Fortunately, Rosanne once played the actual audio from a WB cartoon (Pepe le Pew, I think).
That’s all for now. I think this might be my longest post here ever.
* get those things off, you’ll run much faster. *