There are not enough options by using BTC right now..
I hope it will improve someday.
There are quite a lot of options, actually. There is cryptothrift, which is similar to Ebay (but accepts BTC). There is Bitpremier, where you can buy luxury real estate for Bitcoins. There is agoracommodities, where you can buy Bullion for Bitcoin. I agree that Bitcoin shopping doesn't have the variety which Paypal VISA shopping possess, but it is vastly improving.
That are really good examples, why I can't spend bitcoins. I don't use Ebay(anymore). I don't buy luxury real estate(I can't afford normal real estate without going into debt). I wouldn't call buying Bullions USING bitcoins, since Bullions are just another form of speculation/savings, it's like buying altcoins with BTC.
I live in Austria, which is one of the richest countries in the world, but People here are just very slow, when it Comes to Adoption of new Technologies. I might go to Berlin in Summer and buy some coffee with BTC.
The only other realistic use of BTC for me is gyft, but the last time I bough something on Amazon, I didn't think about that