Sheldon's age hasn't been discussed often on TBBT, but it's been noted that he was born in 1980.
One of the first things fans learned about Sheldon was that his home was his oasis, and part of that oasis was his "spot" on the couch.
Fans have pointed out this rather interesting aspect of Sheldon's financial status. Sheldon seemed to have saved up quite a bit of money because he revealed that most of the things he wanted to buy have not been invented yet.
Sheldon and Leonard had one of the best friendships on TBBT because the other had strengths that the other lacked. They supported each other in times of need and gave each other great advice.
With so many episodes under The Big Bang Theory's name, it's understandable that a few details about Sheldon's personality were forgotten about or brushed under the rug.
There are numerous life lessons that fans learned from Sheldon and co. on The Big Bang Theory. Sheldon learned most of his life's lessons by trial and error as a child in Texas.
It could be because The Big Bang Theory is a TV show, but it seemed strange that two brilliant physicists had nearly as much time as Sheldon and Leonard had.
Remember the nasty trick that Leonard, Raj, and Howard played on Sheldon when they were in the North Pole studying magnetic monopoles?
This was one of the most acutely obvious plot holes in the entire series; Sheldon made a huge deal about his germophobia in the first couple of seasons.
One thing fans could not make peace with was the fact that Sheldon used Internet Explorer to browse Facebook, especially because it's widely considered the worst browser for social media.
For someone who was perhaps one of the smartest men in the world, Sheldon was shockingly ignorant about basic issues like race, culture, and history.
Sheldon made a few comments throughout The Big Bang Theory that he didn't have much time for friends because he was always too busy working on his studies.
