Nice list! But there are a lot of titles I don't know...I should check them!
Anyway,
Island themed games...that reminds me of Destination: Treasure island, Longest Journey, Myst series and something I played a few months back , Jolly Rover (funny).
I know you said over 2000, but I just can't help myself :Broken sword 2 (ahh... Ketch's landing
)
As for "playing the game depending on the season" I just can't!
Whenever I fell like playing something no mater the scenery and it's possible, I usually do.
I only have one exception:
I only like snow when it's on my monitor!
If it's winter , cold and snowy , I put sand, sea and palm trees wallpapers on my desktop, and don't play snowy games!!!