In the end we had 1380 responses!
For the numbers, 69 was the most picked by far which is to be expected on Reddit.
37 was 2nd which isn't surprising as it is generally considered to be the most picked number from 1-100 when people are trying to be random. Another noticeable pattern is numbers ending in 7 appear closer to the top while multiples of 5 are closer to the bottom.
More people picked 2 than 1 and similarly more people picked 99 than 100.

For the letters, there was a very clear favourite of J while 2nd place was A. A noticeable pattern is that a lot of the later letters in the alphabet were picked less and unlike with the numbers, there were less people going for B and Y over A and Z.

Thanks to everyone who sumitted a response as I would definitely not have expected this much feedback which gives us a pretty good sample size :D