Hi gdeo,
my personal requests for threads to be saved would be ones which all aren't showing up as by the designated link:
1 - the flaunt thread;
2 - Maija's Hellboy Cooking / Recipe Thread;
3 - my Hellboy Breda Comics Festival Convention Thread;
I cannot assess whether these would already have become lost or not, because at least since the reboot the search function doesn't work, with Google also seeming 100% unable to show me threads from any time before the reboot of May 30th 2014 (anything that does come up remains blank).