I do travel frequently but so far haven't had any negative experience with TSA except for minor general inconveniences.
1. Some times you end up in a line with a "granny" TSA who is so slow that you wonder whether the person would retire at the end of the day.
2. Some time you stand in line so long that when you see the light at the end of the tunnel, the TSA takes a break or they close the line and move you to a new line etc.
3. You wait in line and suddently, the TSA opens a barrier and lets in a bunch of people.
4. You clear the security after removing your belt, shoes, laptop, change etc to find at the otherside, there is no place to sit and "reassemble" yourself. You endup hopping around in your socks, holding your pants with one hand, and lugging other items with the other.
5. I worry so much about my appearance (to match with the picture ID) that I shave three times a day and keep whatever hair I have exactly the same way as I have in my driver's licence.
6. TSA have more badges, decorations,and stickers on their shirt than Micheal jackson ever had. If I avoid looking at them, I could be profiled as "sneaky"; If I make eye contact, I could be considered "theatening." Generally, I look busy and pretend to take some inocuous item out of my bag.
7. I have also encountered "snoopy" TSAs who just are curious about what people carry in their luggages. Fortunately, I don't carry anything out of the ordinary.
8. In some airport, the security line is a maze. You think that you have reached the end of the line when suddenly the line takes a corner and you see fifty people ahead of you.
9. In some airports, you put your belongings on the teble only to realize that the table ends around a corner and you need to transfer them to the next table.
10. There are very efficient, friendly, and helpful TSAs who go out of the way to assist you. Many times, TSAs have directed me to the right concouse, shorter lines, and have wished me a plesant trip.
My suggestion to fellow travellers are-avoid the line if you see families with small children and strollers-car seats-backpacks with die cast metal toys, people with jackets on top of jackets with loose change for a hundred dollars in their pockets, those with heavy gold chains, bangles, large metal belts, knee high boots, small animals, tool belts, etc ahead of you. These together with an inefficient TSA are guarenteed to make you miss your flight.