Ooh, tough. I'm thinking voice acting.

WYR witness the Pevensies' coronation or see the planting of the Tree of Protection?

Ehhhhh.... I think the the planting of the Tree of Protection. It just seems a bit more.. magical. 😛

WYR be left in a cage of branches overnight or have to spend the night by the Tombs of the Ancient Kings?

Tombs of the ancient kings?

I like freedom and spontaneously (but probably erroneously) the night outside Tashbaan felt hotter.

WYR ride through the desert in the heat of the day or walk through the outskirts of Harfang in the cold of the night with a blizzard?

Ahh! A really hard one!
Ummmm..... Cold. I like the cold.
WYR meet Tumnus or The Beavers.

The beavers. Fish and boiled potatoes, with a jug of beer ...

WYR flee from White Witch or from Giants of Harfang?

Oh...probably the Giants. No wand to contend with. 😉

WYR visit Cair Paravel for a day, or Taashban for a year? 🙄

Cair Paravel, for sure!

WYR try pavender or a marmalade roll?

Marmalade roll!

WYR meet the "us lions!" lion or the Jackdaw?

Tough one, I'll go for the jackdaw. No, the "us lions" lion. No ... yes.

WYR be Jill in releasing Rilian or in releasing Puzzle? (since most here are girls ...)

Great question, Hansgeorg! Rilian because pretty much after that their mission was accomplished while freeing Puzzle was just the first step in uncovering the enemy's treachery...

Would you rather float/be blown by Aslan into Narnia or be summoned by Susan's horn?

Floating on Aslan's breath, for sure.

WYR explore Cair Paravel's ruins or explore King Lune's castle (while habitated)?

If you mean "explore" strictly, well, still King Lune's. I mean, if you come to a room you don't know what it is for you just ask.

Otherwise I would have said "Cair Paravel, since in King Lune's castle it would be sightseeing not exploration", but that doesn't quite hold.

Would you rather be caught trespassing at Cair Paravel or in King Lune's Castle during the Golden Age? (Obviously not in the Tisroc's palace in Tashbaan, that's why I am not asking).

Hrrrrm... uh, Cair Paravel.

WYR fly over the Western Wild on Fledge or sail across the Eastern Ocean on the Dawn Treader?

Fledge.

I am not sure Rynelf would like me better than Eustace.

WYR see slavery abolished in Narrowhaven or the three nobles wake up with enchantment broken at the table on Ramandu's Island?