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"Watashi wa anime ga suki desu" (or "daisuki desu," depending on how much you love anime. "Daisuki" is much stronger).

"Ai" isn't a verb. "Ai suru" is the verb (usually in "ai shite iru" form "am/are/is/etc loving" or "in the state of loving"), but that sort of love seems inappropriate for something like anime. It's more of a romantic love, or at least a much deeper kind of love, and Japanese people don't use it nearly as much as we use "love."

If you were to actually use "ai suru" to describe your love of anime, it would be "Watashi wa anime o ai shite iru." Though word order is not quite as important in Japanese as it is in English thanks to the particles, the most important/basic (I guess) part of the predicate usually comes last (though in English, the verb is the most basic part of the predicate, Japanese doesn't necessarily have a verb in every sentence. The predicate can also be a noun predicate or an adjectival predicate). In this case, it would be the verb "ai shite iru." The "o" is a particle that marks the direct object. I think "wa" is appropriate for this because you're just making a general statement about yourself. However, if, for example, someone's asking "Dare ga anime o ai shite iru?" you would use "ga" in your answer instead.

"Desu" isn't used for verbs, but rather for nouns or adjectives (though its use with i-adjectives is a bit different than with nouns and na-adjectives). In the correct example above, "Watashi wa anime ga suki desu," the "suki" is a na-adjective (so-called because when it appears before a noun, it has a na after it. e.g. "kirei na hito" = "pretty person"). Like/love vs. suki is something that does usually confuse new learners of Japanese since like/love are verbs and suki is an adjective. So, if you want to translate it more literally, it's more something like "As for me, anime is likeable" or something like that. The point is, they express this idea of liking something by making it an attribute of the object rather than making it something that we do to the object.

Finally, it's okay to omit "Watashi wa" in sentences, so "Anime ga suki desu" is a perfectly fine sentence as well (and unless someone else has been the topic of the conversation, it'll most likely be understood that you're talking about yourself).

Sorry for the lengthy reply!

watashi ai anime desu literally means 'i am love anime.'

watashi anime ga suki desu [i like anime] is fine.
always remember that the verb is always at the end of the sentence.. smile