I do so enjoy being the whispering voice in the back of your head, urging you to buy videogames because they're slightly cheaper than normal. Heck, you aren't going to play most of them anyway, but just think -- one day, you might! It's the same justification used by moms everywhere to buy clothes no one in the family actually needs.
Here is what Steam is offering right now.
While I don't have personal experience with enough of the titles in the Action Pack to speak of it either way -- I'm sure it's a steal, at the price -- I can happily recommend the Variety Pack. Do it up.