At the moment they include but indeed are not limited to:
These are currently my top three. Naruto of course speaks for itself truly a crossover success in the west with a load of DVDs and video games across the platforms. Bleach is probably just behind it but none of its games have been translated yet apparently. Naruto is the story of a young ninja at a ninja village and his maturing through missions and trials and making friends and enemies along the way. Vampire Knight is decribed as from the female-oriented genre of manga turned anime shows, for instance like Card Captor Sakura if you are a real anime geek. I could see why that is indeed the case but how the Japanese aim cartoons at women is entirely different from how the West does it, all you need to do is compare this with say My Little Pony Tales.
That leaves us with Kidou Senshi Gundam 00. Anyone who knows anything about Japanese cartoons should know about Gundam, off the top of my head it must have been with us for more than 20 years and is probably one of the most well known animes ever though likely not as well known as Transformers.
So basically if you wanted to get back into Anime or you had a little money set aside or some new DVDs you could do worse than picking up the first season of Vampire Knight (without the Guilty suffix) and Kidou Senshi Gundam.