Hi!
I'll just mention my list from the sets i have since the wishlist is massive:
42009 mobile crane, this was the first big set i got and what really got me into the hobby. It's so impressive and sturdy when built, just feels really cool to play with. Awesome B model too with decent playability.
8258 crane truck - always admired and wanted this one, finally managed to grab it this year in good condition. Every time i want to take it apart to do b-model or alternates it just looks so nice i don't have the heart to do it!
8109 is a close third for me, very nostalgic as this was my first lego technic build.
So many beautiful building techniques in these and i'm really attached to them.
Found a few more pictures of the set. Not great, not terrible.