Research company DoHouse conducted an online survey about the rating of TV anime series. 23,388 respondents answered the number of TV anime programs they watch in March 2010. (The respondents were selected from 2.6 million registered users in order to avoid bias and maneuvering.)

Bar Graph of the result (y axis: age, x axis: percentage)


About half of the respondents watch one or more TV anime programs regardless of sex. There is a clear boundary in the age between 40's and 50's. The following titles were frequently mentioned in the comments of the respondents in wide range of generations:
Fullmetal Alchemist: Brotherhood
Durarara!!
Baka to Test to Shoukanjuu
Pokemon Diamond & Pearl
Gintama

Long running titles such as Sazae-san and Chibi Maruko-chan were less frequently mentioned.

Along with the survey above, they also surveyed the rate of the name recognition of 28 popular seiyu. Here is the result:
The name recognition of female seiyu was significantly higher than male seiyu. The highest recognition of Mizuki Nana can be attributed to her appearance in the popular music show Kohaku Uta Gassen last year.

Source: My Enquete

Note: This is for the first time that this company conducted an anime (otaku-culture) related survey. Being an online research is the only possible bias. example of the topics in the past: eating habits, traditional events, hay fever etc.