Does our need for similarity decline as we age?

Hi everyone, Since the lecture on attraction I have been reading over people' comments on their blogs regarding being attracted to people who are similar to you as opposed to people who are different. I was looking around and couldn't find any literature stating whether this finding differed depending on age. I wanted to find this as I was thinking my partner and I tend to be very similar in so many aspects of our life, such as eductation level, ses, morals, values, family,friends....even things like cooking and cleaning habits. I was thinking though, perhaps we are so similar because we started seeing each other so early on in our lives and so were experiencing so many new things like living out of home at the same time. In contrast a collegue at work who is much older than me said that when she separated from her husband she found it very difficult to find anyone with hardly any similarities to her. She said she was at a stage in her life where she was set in her ways and unwilling to have to change her lifestyle to suit someone else. Her current partner and herself seem to be completely opposite in so many ways yet she says they are so similar in their home life that the other differences works in their favour. I was wondering if the areas of similarity that we seek change depending on our age. Just something to think about....What areas do you think you look for similarity in? and what areas do you appreciate differences in?....
Rach