I for the most part am content. Have had the bad times so I just am . . . content.
The box opening thing made me remember back a number of years though. I had a friend at the time who owned a hobby shop and he found a defunct distributor that still had a bunch of back stock. I ended up with a BUNCH of kits from that. While I was opening them and looking through them, many had the old fold up catalogs. I finally opened up a kit of Monograms 1/24th scale Classic Cord. Their classic car kits always had a special unique smell and it hit me quite hard that day. Being in the reminisce mode the smell gave me an awesome VIVID flashback to the old dining table area in my parents old house as a kid.
The table was cheap with fold up leaves and chairs set on either side. There was a light from the ceiling that could pull down. The vision gave that full thing for just an instant. I was there, at night with the light on with it's golden glow and the table, chairs and wall behind them. I can still see it to this day though I would probably have totally forgotten that if not for the flashback.
I guess it's things like that and good memories that keep me happy.