Languages. I cannot and never will learn a second language.
Singing. Terrible.
Enjoying babies—just never, not my own and not my grandkids, until they are 3.
Card games
Sigh. Most everything listed here.
Remembering people’s names. Recognizing people I have met before.
Making decisions. I can talk myself (and others) into or out of any choice. I’m also terrible at talking on the phone. I get oddly nervous and act like a weirdo, talking too much or too little.
Directions-I have 0 sense of direction. The invention of the GPS is my life-saver and will be my d22’s as well since she’s just as bad as I am.
Nursing 
I wish I were better. I’m a GREAT teacher and I am really good at social issues and solving problems. But sickness? I just can only do so much sympathy.
Keeping my thoughts from showing on my face. (Which means I never lie … but also means stupid people know how I feel about them.)
Singing, I can’t carry a tune in a bucket. Multi-tasking. Remembering names and faces.
Singing, although I love it.
Whistling-so frustrating.
Small talk-ugh
Opening cartons with spouts. My family has banned me from attempting to open milk/half and half cartons.?
Art/drawing
Self manicures/pedicures (goes hand in hand with no art skills)
Remembering names and faces
Recognizing celebrities (see above)
Meal planning more than 2 days out
Clipping and using coupons
Throw a ball (but otherwise I can at least hold my own athletically)
Sending greeting cards for special occasion and sympathy
I’m not a great singer but joined the church choir 5 years ago and have learned so much. You can improve this skill with good coaching and practice! My “what would you do if you knew you wouldn’t fail” item is sing a solo in worship. Or maybe at least a duet - with a great accompanist!
Certain kinds of manual dexterity. I can’t cut in a straight line very easily or fold things well or iron so it works. When I was in grad school, my roommates called me “Saran wrap-impaired”
Going through files to throw things out. I can’t do it without help. Packing to move – I’m incapacitated.
How did we all get this far in life with all of our “can’t do’s”? We all obviously have redeeming qualities (we became parents).
How to argue with your spouse. Remind him of HIS failings when he doesn’t understand how you can’t… Or just explain once again that you just can’t do simple xyz.
How to run my husband’s music player app while trying to stay aware of where we were going. The streets are crazy here! Even with Google maps.
A perfect demonstration of how it takes pretty much all types to make the world go around. Every human gets their path. When I get the often demoralized kids in our lower level academic classes I remind them about how they probably are very good at something else - often asking them what they are good at so they can see it. We should never be dissing the janitor or maid while praising the CEO or brain surgeon as many humans do on our artificially created “worth” ladder. They each have their strengths and weaknesses and it really does take all* of us to enjoy life here on our planet.
*personally I think the world could do without terrorists and similar ilk, so I have to modify the conventional saying just a little bit.
@ivycover “Has anyone mentioned whistling? Violin vibrato? Harmonica?”
I played violin in my HS orchestra and was never very good. About 4 years ago I found a local orchestra for adult novices. Most of us were HS players who hadn’t played an instrument in 20, 30 or 40 plus years. A few picked up an instrument at retirement. I started taking private violin lessons and discovered none of this comes naturally. I keep working at vibrato but it’s just so much effort. I keep thinking it will be like getting the bicycle to balance and once you got it it will seem natural. We will see.
@NorthernMom61, I think the answer is to surround yourself with people who have complementary skills and/or personalities. In my case, there are a set of things I’m horrible at that involve fine manual dexterity or organizing physical objects or lots of detail. Fortunately, I’m very good at the big picture thinking and abstract reasoning. So, I organize my life to hire people who who have complementary skills. So, in my primary company, I hire an executive assistant who handles lots of details including personal stuff that would take my time and I seek people who are bright, proactive, charming and a bit anal compulsive and owns his/her work. I hire an office manager who is bright, deeply loyal and demanding. I married a wonderful woman who is not organized but has extraordinary social skills, which makes up for some deficits on my part.
If the deficit is whistling, no need to find a complement. But, if it is organizing details of life, a complement really helps.
I’m feeling it now as my EA is pregnant and is losing attention to detail. I can’t count on the fact that everything will be taken care of and that means I have to attend to lots of details (80% of which are taken care of but 20% are not). That moves my mind from big-think to details, which is neither fun nor helpful to my business.
Agreed. H and I are terrific complements for each other. I prefer each of us having different strengths/weaknesses so we aren’t competing against each other. The other good thing is we agree on the things that don’t matter like whistling (or for us, sports, fashion, Hollywood stars, etc). Then we agree on which whistling things we both enjoy (how/where/what with traveling, TV/movies we enjoy, rural living, etc).
We have our own worlds with our jobs so we each get a turn to be the “leader” and “other half” socially too.
Math. I can do the basics and nothing more. I remember someone on the pet peeve thread saying his was people who can’t do math and I was insulted!
I’m terrible at playing volleyball.