Reactions (not what you think)Link
This kind of stuff is why I fell in love with Organic Chemistry and spent half my life in school to learn it.
Chemists have favorite reactions. They have favorite reactions not because of what they make, but because of what they feel like. Chemists can imagine things so small and so fast that they can not be directly observed. And they can have a specific affinity to one. I like it when people have favorite intangibles. Beautiful.