I think - no, I know, that Agnes and the Hitman has to be my favorite.
I absolutely loved Agnes. I liked that the hero and all his macho shit was written by a man (but thank God it wasn't John Ringo!)
The plot got a little convoluted, but the vibes between Agnes and her hitman were right on. She captured him with food, lol. Loved it!
I could reread this book forever, because Agnes not only had a relatively unused name (which I don't care for and never did), but her peronality (ever so slightly paranoid) had me laughing out loud.
I might could be persuaded to another Crusie book as favorite (thinking Charlie at Night here), but it will be a hard sell. *grin*
I have reread Crazy For You a million times and I'll read it a million tmes more. I learn more about writing from that book as it moves the characters through growth arcs that hang together, make sense and just rock the house down.
However, I'm going to say Welcome to Temptation is my favorite because it was my first. In Welcome I discovered Crusie magic: how she weaves food and music, strong heroines, sex and humor into a wonderful stew of character foibles and ultimate growth.
Welcome to Temptation had one of the first literary charactors I wanted to boink (on the edge of a dock, on a pool table ... c'mon Phin, let's do it!) and a heroine who skated on the edge of bad. Sophie and her scamming, sex movie filming ways.
Oh goodness, if you haven't read it, do. It's just that damned good.
So what is your favorite Cruisie?