What's your opinion?

I only really want to when they all come out as one cheaper package.

I bought the legendary cars pack, Cops and Robbers, and Big Surf Island. I only slightly regret buying the cars.

The only other premium DLC I'd buy at this point is the Party add-on, to get all achievements for Burnout Paradise. Since that's a bit of a piddling matter, I'm just waiting for a point where it either drops in price or I get 800 spare Microsoft points to burn.

I bought The Ultimate Box, so I got Party Mode and Bikes through the purchase, strangely it was cheaper than the core game.
I've also bought Cops and Robbers plus Big Surf Island.
I refuse to pay for new cars on their own, they seem way too expensive and the Toys DLC seems just a bit too.. naff.

I got the Legendary Cars and Island. I don't regret either although none of the other DLC really interest me.

Same, Paid for the Legendary Cars and Big Surf Island, both were worth it for me.  and seeming the Legendary Toy Cars are unlocked with the island, its two birds with one stone for me.

I haven't bought any dlc, I guess I'm part of the reason why we can't have nice things...

big surf island is amazing 

I bought the Legendary Cars pack and I'm debating whether or not I should buy Big Surf Island. I really want to, but I don't have a job right now...

I got everything. The only thing I regret is those dumb toy cars.