Full Metal Panic? Fumoffu has to be one of the funniest anime series i've ever seen! It focuses on Sosuke and Kaname's school life (much like the 1st disc in FMP did) and doesn't have armslaves or anything war-like in it at all. The first disc is awesome and i would reccommend anyone who is looking at buying it to buy the box too, beause i'm sure you'll want to finish the series until the end (there will be 4 discs in total).
(Also note that fumoffu is more of a spin-off series than a sequel to the 1st Full Metal Panic)