Originally Posted by Keaton421
Saying watashi seems a bit informal. If you're a male, you can use "ore" or "boku" (my girl says boku sounds nicer somehow, if you're trying to decide).
But generally, saying "I" is implied in Japanese, so you don't need to say it.
I think you got it reversed. 'Watashi' is rather polite, while 'boku', and especially 'ore' are informal. Most Japanese I've talked to seem to feel that saying 'boku' is a bit childish, whereas 'ore' should not be used except among guys of the same age group (usually younger guys).
And as far as the usage of watashi, MMM has it right... it's unneeded in most sentences (more so in spoken language than written), and it sounds unnatural if used to much. While we're on the subject, try not to use 'anata', either - the "proper" uses for anata are rather limited, and you'll rarely hear it in spoken Japanese.