Keep up the good work! We should share our collection!
Here is my little album of reactions I've pillaged and reuploaded for use.
https://imgur.com/a/UzIft
Here is another album of generic GR stuff that I've been using on the forums here and elsewhere for a while.
https://imgur.com/a/sWt2b
My favourite GIF is still Kat the Pretzel Smasher.