You can basically juice anything: berries, pineapple, apples, oranges, lemon, carrots, melon, spinach, cucumber... the list goes on, i think basically anything but mangoes and bananas as they are too fibrous. The amazing thing is, no matter how odd a combination may sound, it always tastes good. Something we learned from making plain strawberry juice is that sometimes the flavour of one fruit can actually be intensified by complementing it with another. For example, if i'm in the mood for a simple juice when i get home from school, or we just don't have any special fruit around the house, i will always make orange and carrot. It's an old standby: you can hardly taste the carrot (well, this depends on how much you add) but it tastes like it's a more special and sophisticated version of OJ, not to mention you inevitably get a larger variety of vitamins when you mix up different fruits and vegetables. You could also make some pretty amazing cocktails with this juice, assuming of course that you are old and wise enough to be consuming cocktails.
You also get a bit of fruity foam at the top of your juice, which not only makes it look fancy but also tastes good and has a cool texture.
This is also an amazing source of vitamins im sure, considering that Derk and i pretty much finished all the fruit we bought. It's a bit of a pain to clean the juicer but it's definitely worth it, especially if you are making juice for more than one person.
You can also use the pulp to cook with to make, say, carrot cake and other such things. The pulp is also pretty to look at, but this may just be my artsy side speaking...
Basically, get a juicer. You wont regret it.
Cheers!