My goodness, there were so many.
Routine - Rolo loved routine, anything out of the ordinary and it annoyed him!
I loved the way he'd lick me and give me little kisses but not for long, soon he'd push my hand with his nose which meant it was my turn and that he was ready for head rubs.
The way he'd appear around the side of the sofa at seven o'clock every night as that was when he'd have a fenucreek treat.
Whenever I was cleaning out his pen - he'd be nowhere in sight but as soon as that dustpan and brush appeared, he'd be in the middle of things, desperately trying to get into the bag of old hay!
Sorry, I'm going on a bit - I just have so many wonderful memories of him.