I think my favorites are once I put my heart and soul in formatting and creating them which I think they were a good test in using the HTML format that is available on the forums.
Examples:
The ones that I would like to erase from my memory are the one that made me cringe after reading them again, ehhhh ahhhh.
Update:
As I’m writing this I noticed that the two guide threads for D.Va and Tracer have an issue with images, today I took some time fixing that for the Tracer guide and will do the same for the D.Va one, sorry that this had to happen.