This is a subjective area where investors will have distinct opinions on which domain name types to avoid - such as certain extensions or name length. We highly recommend researching and gathering multiple perspectives on this topic prior to committing to not registering certain types of domains.
With that said, as we covered earlier in this guide, avoid registering branded or trademarked names. This also includes domain names that target a brand but are slightly spelled incorrectly as these can be the target of UDRP.