Formal:
* Мне нравится (mnye nravitsya) - This is the most common and neutral way to say "I like." It literally translates to "It pleases me."
Informal:
* Я люблю (ya lyublyu) - This means "I love" and is a stronger expression of liking. It's often used for things you really enjoy or have strong feelings about.
* Мне нравится (mnye nravitsya) - This is also used informally, but it carries a slightly weaker sentiment than "я люблю."
* Я обожаю (ya obozhay) - This means "I adore" and is used for things you have a deep passion for.
* Мне очень нравится (mnye ochen' nravitsya) - This literally means "I like it very much" and is a more emphatic way to say "I like."
Examples:
* Мне нравится эта книга. (Mnye nravitsya eta kniga.) - I like this book.
* Я люблю пиццу. (Ya lyublyu pittsu.) - I love pizza.
* Я обожаю смотреть фильмы. (Ya obozhay smotret' filmy.) - I adore watching movies.
* Мне очень нравится этот фильм. (Mnye ochen' nravitsya etot film.) - I really like this movie.
Choosing the right phrase depends on the situation and the level of formality you want to convey.