Dine Out first, Spa Day second. I love going to the restaurants and prefer the CAS/build mode.
I know you didn't ask about gameplay, but in case this gives you another way to look at the stuff packs: Vintage Glamour and Cool Kitchen are more home focused (though ice cream can be served at restaurants). Perfect Patio and Luxury Party suit both community lots and home. When thinking of the main gameplay object I view Bowling Night, Fitness Stuff, Backyard Stuff and Romantic Garden more community lot oriented packs.
CAS and build/buy buy wise I would rank them:
Romantic Garden (love the guy clothes actually and the plants!)
Vintage Glamour (the jewellery is my favourite, also really nice curtains)
Fitness (better than I thought it would be)
Perfect Patio (not a lot of stuff, but good to use)
Cool Kitchen (don't have)
Bowling Night (I dislike the build/buy, but CAS is nice)
Backyard (I quite dislike the build/buy here as well, but CAS is fine)
Luxury Party (don't have)
