I don't have a horse but my favorite memory is when I realised how far I had taken a lesson mare with trust.
That’s absolutely amazing!! I’d love to do that eventually too... my best memories are the little things with my horse; she used to hate going into the barn but once she realized it was safe in there she was totally fine. I remember how she changed once she knew that and it was such a good feeling! I have a lot of small memories like that which are probably the best for me :)