Well since there was a saddest I thought I would bring about a touch of balance.

While I am only 5 hours into the game I have already felt unusual joy from an encounter.

Sven, and I hit it off real quick. We did a bit of hunting, and 'bro bonding' on the way to Whiterun. After getting the mission to check out the dragon near the tower I had a bad vibe, and thought about leaving my new friend back in Whiterun. However off we went together toward the smoking remains of the tower.

During the fight with the dragon we got separated, and I was sure he had perished. When the battle ended I stood around waiting on my friend to show up. When he failed to I started to look for his corpse, and started building the epic tale of poor Sven's demise that I would be telling Camilla. When from around the corner he came running to me. With a high five that caused a minor tremor we greeted, talked of dead dragons, and wondered how we where ever going to top that battle.

...
Short of it
I thought I had lost my first companion Sven. Who only after a very short time in his company I am illogically already attached to him. While I don't play Iron Man I do with with my companions. Its something I carried over from Fallout, and it seems to give them more... meaning if they can go away at any time...

So whats your story of joy, and happiness ?

Hmmm , funniest perhaps.I'm trying to be super sneaky guy and lydia simply isn't having any of that and starts fidgeting on a trip plate for a spike wall. It slobberknocks her into the next area , she comes running back with 3 draugr in tow looking all puppy-dog eyed at me , trips the switch again draugr go splat and she says something about not like the looks of this......