Very much, occasionally, occasionally
I love eel in sushi if done well. It's deliciously.
I enjoy octopus too, except when it's chewy which is often is... so I normally will steer clear unless convinced.
Squid? Well, hard to pass up a good calamari — but again, not if it's the consistency of rubber bands!
By the way, there is something called eel sauce in Japanese food. There is NO eel in it. It's just served traditionally on eel. It's basically soy (with mirin, sake and some sweetener).