In reply to Oceanrower:
Before it gets into the kitchen, celeriac is of great interest to the gardner. Its not easy to grow - slow to germinate and develop - and demands moist rich soil. In SW France it attracts voles - which take obvious pleasure in tunneling it hollow from below - to fool you into thinking all is OK. Once grown to a good size it holds advantage as a good storer - compare with stick celery.
In the kitchen my vote would be to roast it - as others have proposed. Done correctly it makes for exquisite variety from parsnip, squash, potato. We have probably eaten more of it raw - grated into a tossed salad.
Overall as a gardner/provider I see a lot of veg go through a wave of popularity when the item 1st comes into season - followed by boredom then repulsion if it appears too frequently on the table - a commentary rarely applicable to the potato ! So - desirability is a question of balance.