I would use a .com being it's the most popular.
.biz is used by small businesses for web sites.
.com is for businesses, commercial enterprises, or online services.
.edu is for schools and other educational websites.
.info is meant to denote credible information bearing websites.
.name is specifically designed exclusively for personal use.
.net is for networks; usually reserved for organizations such as Internet service providers.
.org classifies sites belonging to an organization.
.pro is for use by professionals, such as attorneys and physicians.
.travel classifies travel related organizations.
.tv is for entertainment entities.
.us classifies the country (in this case the United States) that relates to the particular site.
*All the other extensions out there are pretty much self explanatory.
Never hurts to also purchase a couple others (.net, .biz) to save you from somebody else using your name at that extension & confusing people that are looking for YOU. Also if your name is two-part, it's better to have the website your-name.com & also have yourname.com but forwarding to the one with the "-". That's for search engine uses only though.