It's just too hard to remember all the good times while gaming, 10 years back.
Not a kid anymore, but surely I had some moments in last 10 years. I mostly played RPG's with some action games here and there, so I mostly replayed RPG's where you attach yourself personally without chasing some score.
I do remember being addicted to aforementioned Time Splitters, creating levels, gaining achievements, etc. Used to do all the common - get all characters - and collect all orbs/ coins / gems things, just never wrote things down.
I guess if I ever competed online it would be recorded somewhere, but well memory card is my diary book. ˘˘