[tsubaki]

If the Uni is fresh, (light to pale orange not light brown)ask for it.
Then again it's all to personal taste.
Depending on the chef you will have the best or worst experiance eating, honestly we were served from the same chunk of meat by two different chefs and the difference was unbelievable. The chef we have been going to for over 10 years moved to partner another resturant about 20 miles away, we haven't had any since.
Oh try Saba (mackeral), if fresh it's great.
Tako (octopus) is much much better than squid.
Just for the meanness of it appreciate the Wasabi (good on mackeral). Here it's green colored (artificial) there it's almost white, supposed to be much better.