I do not have a favorite, because I have not used the Osechi delivery service frequently enough to establish a favorite. However, the one I used are by department stores, Mitsukoshi and Takashimaya. When I did Osechi delivery, it was a semi special occasion for my folks. Mitsukoshi and Takashimaya have a bounty of choices from menus created by various ryotei itamae (chefs) in Tokyo and Kyoto. There are also Osechi menus made by chefs from Western restaurants (French, Italian, etc.) in Japan.

Osechi from Mitsukoshi or Takashimaya will be fancy Osechi, fitting for once a year event. Also, there are various osechi based on different cuisines to fit the palate of various people.