Vibrant Nation

Do both.  Get the 2 accounts.  Twitter is a micro-blog (just put short "happenings" in your life.  You can write longer passages into Facebook.  These sites are meant for you to have fun...but they can also be used for business purposes.  Just be yourself and show your personality and if people pick up that you have something to sell (I have a website for 50+) too, well, that's really cool, isn't it?  

I would say no. Facebook is a larger network and you might find more of your friends on it. You can share photos and videos and also join groups and become a "fan" of organizations and businesses you support. Both Twitter and Facebook have a "status update" feature that answers the question: what are you doing now? You have about 140 characters in which to respond. So, it's short, but sweet.

I prefer Facebook and call it my "Virtual Real-time Scrapbook." My non-techno-savvy parents and friends have "finally" opened Facebook accounts because of me, just so they can see my teenage boys, who are growing as fast as bullet trains and involved in multiple sports at high school. Even if my parents never add to their profiles, they can keep up with everything we're doing, and to them, that's a BIG plus! I also have found college friends and old boyfriends... and I love to see what they are up to in their lives, while sharing my family too!

I have facebook and keep in touch with friends, children grandchildren send pictures etc.. I signed up for twitter but not sure what to do with it.

I like Facebook to stay in touch with family and friends. Twitter was useful when we experienced the December Ice Storm. Our local electric company used Twitter to communicate where they were for repairs and when we might be able to expect our electricity to be available....8 days later :). I twittered at work that week and used nice candles at home :). I don't have a Twitter account because I don't feel like I have time available to do both.