Indeed, everyone has different approaches and motivations!

As a blogger since about 1998, I'm likely not representative of the norm out there; there was a time when I managed and maintained over a dozen niche blogs simultaneously, several of them as "informational adjuncts" hobby and niche interest sites (mostly psychology and self-help).

Some people believe it's best to have all your content in a single location... I also don't have a concrete answer to what's the "right" way to go, but I think it depends on the individual.