For new people, for ongoing domain registrations people should also consider the renewal costs. There are some registrars with somewhat predatory pricing schemes that end up being very expensive long term (e.g. the trendy .io TLD).
Dot com and dot net are some of the most stable ones, even though they might not appear as such at first glance. Almost anything less costly on initial costs will cost you in some other way (might not offer whois privacy (.us iirc) or be limited to residents or people with legit business on that country (.ca) or have a mixed reputation with being labeled spam (.xyz - although I believe this last one has been kind of proactive in clearing that up).
Sorry to highjack the comment, but I wish someone had warned me to look, not all TLDs are administered the same.



Identity theft is not a joke
JimMfat!