Utawarerumono is a story centering around the masked protagonist, Hakuoro, who one day is found by a family of two girls and their grandmother in a nearby forest close to their village. He is badly injured and is soon found to have amnesia, so they take him to their home and treat him until he is well again. Hakuoro is soon accepted into their village where he stays and lives with them, but before long Hakuoro finds that life in this village is being oppressed by the greedy emperor who rules over the country their village resides in. Soon after, these negative actions taken towards their village result in him leading a rebellion against the emperor of the country which later lands him to become emperor of a vast new country which is named Tusukuru, after the well-respected woman who helped save his life.
http://www.youtube.com/watch?v=cNMKxeKdt0g
Most episodes follow Ebichu, a talking hamster devoted to her oft-indifferent owner, who is only identified as OL ("Office Lady"), a single 28-year-old (this is her age in the original manga series while she is 25-year-old in the anime series) who doles out cynical commentary and the occasional beating on the rodent. Ebichu tends to take this in stride with endless praise and compliments. Such abuse is usually caused by Ebichu's almost disturbing lack of tact or propriety, often embarrassing her master in front of other people.
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YouTube - Ebichu and useless bum looking at magazine
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Colorful (this one is personally my favorite of the Ecchi based anime)
Colorful (カラフル ,Karafuru[COLOR=#0000EE][FONT=sans-serif]?[/FONT][/COLOR]) is a manga by Torajirō Kishi which was adaptated into a 16 episode anime series. The episodes are composed of vignettes typically involving men and teenage boys attempting to catch a glimpse of women's panties and/or look down their blouses. The episodes are fast-paced, experimental in animation and sound/music, manic and very short, about seven minutes each, and filled with ecchi comedy. The show is rather ambiguous as to whether it supports the fetishes it deals with or not. The perpetrators within the show usually either fail at their attempt to catch a glimpse, get caught in the act, or suffer Karmic retribution.
YouTube - Colorful - Why don't you cut your hair?