Hard to decide for me. I generally think the packs aren't really worth full price, but that's completely subjective, anyway.
High End Loft Stuff Pack doesn't really count for me, given I got it together with the game itself in the Starter Pack for a few cents. which means my personal value for money ratio is unbeatable. I have (ab)used the furniture in there for years, especially as I like the style of the "new" additions. While most do not, some items even beat the "points per simoleons" comparisons, as far as game mechanics are concerned, like the desk chair, the toilet or the game console. Anyway, I still like it.
Honestly, as far as Fast Lane Stuff is concerned, I only use it for the motorbikes, though those excessively. That Jamboree - speed 10 for a few thousand simoleons. Yes, please! Plus another motorbike for style. I would like the pack even more if it came with a motorbike parking lot. In case that wasn't obvious, I don't care much for the rest...
One pack I didn't expect to like: Diesel stuff. And yet, I use the contents all the freaking time. That includes the few furniture items. It was a surprise that I loved used this one so much. Not sure why I don't appreciate it more, given it's a proven mainstay of my game.
Then there's Master Suite Stuff. This doesn't only contain lingerie, but some of the furniture is that high in the mechanical benefits department that I compulsively use it all the time. It's borderline tacky, and the items straddle both sides of that line, fortunately most of them on the right side.
Anyway, those are the ones I would mostly mention. Maybe, Movie Stuff, too. Still better than those packs I practically never use, like Outdoor Living (I checked, I exactly used one of the hot tubs, once).
