I remember watching Nagasarete Airantou. It falls into the common category of animes where there isn't an exact plot except for the last two to three episodes. It is indeed a great series to pass the time with, and it is one of the more colorful (in terms of artwork) series I have seen.
Other series with similar plot lines include Pita Ten, Goshuushou-sama Ninomiya-kun, and Kage Kara Mamoru (except for Pita Ten, they're either ecchi and/or harem series). I also put all of those together because they have a similar trait on how they end the series.
What am I presently watching? Too many series.
On my list are series like Princess Lover, K-ON!, Asura Cryin', Valkyria Chronicles, Sora no Manimani, Spice and Wolf II, Xam'd: Lost Memories, CANAAN, Tokyo Magnitude 8.0, and the list goes on. In two weeks, when I leave from my present workplace, I'll probably spend a lot of time watching anime and catching up.