See, all the ones you mentioned, Fabbemannen, actually are usable but it takes an annoying amount of practice to be good with any of them -__-
Here are the ones that get under my skin:
1. Spiny Blue Shell -- this ruins my race EVERY TIME. I especially hate how I'm in first the whole time but RIGHT before the finish line on the third lap some prick sends one and then like five people rush past me. Urrrrrgh.
2. Bullet Bill -- I hate using this item; it's actually virtually impossible to keep it past 6th place, making its usefulness limited.
3. Lucky 7 -- ITEM OVERLOAD!!!!! I either get hit by Lightning, making it all fall away; people ram into the items, wasting them; or I accidentally use the wrong item. It's more like UNlucky 7 in my opinion.....
I like these polls, Mario Kart 7 really is a great game