I recently saw The Melancholy of Haruhi Suzumiya and it was really good! It's also a slice of life created by Kyoto Animation and is referenced a lot in Lucky Star, so I would recommend if you like Lucky Star.
Another recommendation is Baccano. It's only 12 episodes or something, but it's really cool! The show is sort of all over the place, but kind of falls into place after a few episodes. The editing is also insane and the vibe reminds me of Oceans Eleven.
Kaiji is one of my personal favorite animes and it's a shame more people haven't seen it. It's a gambling anime with high stakes. Every episode makes me want to rip my hair out. If you don't like stressful animes, it probably isn't for you.