Registration and hosting is so very cheap these days, if it is more than a 'hobby' why not have a professional sounding site name.
I personally do not think I'd buy or depend on information on a geocities, aol hometown, etc. site and I believe that would go for many others.
Ironically, if hosting and domain have become cheap .. they also cannot be trusted. With domains you are always going to come in face of www.full-words-abuse.com .. which is not the same with free sites. I have always found free sites listed in ODP trustworthy.