3 rewards? There should be at least 1 for each career. It's just being stingy IMO. Having said that, the Fridge is the best of the 3. You get a moodlet for a FRIDGE haha. Plus the food perfection thing and the anti-spoilling properties are great for the future generations. You might not WANT a super chef in every family, and they could start off with no cooking ability, yet have great meals).
I've thought of some ideas for a few of the other careers. Most of them are dumb but at least they're ideas
Law - Plaque that protects against burglary (alarms don't always prevent them).
Medical - get the opportunity to take your sim back to the CAS and start afresh if you want (ok bad idea, but invincibility was the other).
Prof. Sport - shoes to make you run super fast?
Science - Packet of 10 special seeds or something
Music - Electric guitar (I know this is available to buy off EA's site, but it should be there anyway.
Politics - Maybe have your own library ?
[Edited for language. -Pam]