For your consideration, my current list of most hated, painfully overused words:
The bus that goes past my house says that it offers Essential Travel for our City. If I weren't boycotting the word, I could shop at Essential Records or Pet Essential or let (AmE prefers rent) property at Time Essential and listen to The Essential Mix on Radio 1 or read the dozen or so publications that say they are the essential guide to the city and what's going on in it before heading over to the Essential Festival, essentially.
If fanatical is less used, it's only because there seems to be a rule that it must only be used in alliterative phrases. The Odeon cinema (AmE prefers movie theater) chain is Fanatical About Film. Upper Crust sandwich shops are Fanatical about Freshness. And everyone else is Fanatical about Football.
Another relevant example is brilliant (informally, brill), which in recent years was the overstater of choice among young people. Now it's amazing, which I hadn't noticed until a Swedish colleague pointed it out. We were in my office when a student came and asked to borrow a book. Our interaction went something like this:
Me: Here you go.
Student: Amazing! Thanks!
Me: You can give it back to me at seminar.
S: You're amazing! Thanks!
SwedCol: [muffled giggles]
These are not the words of an understating culture--and yet they are so repetitively and unimaginatively used. One can't really find too much fault with the young people, as youth everywhere get infected by the buzzwords of their age. But the advertisers? Aren't they supposed to make us want to buy their product, rather than wanting to track them down in their offices and bludgeon them with thesauruses?
Could it be that overstatement is so foreign to British culture that those who try to do it cannot help but do it badly? Perhaps overstatement should be left to Americans, who do it so effortlessly. Mission Accomplished!