I don't think I know anyone who loves open data and transparency more than Robert. MusicBrainz is open source to the core and all the development as well as most of the business stuff happens on public IRC channels and our JIRA.
It's been a crazy time lurking on IRC and seeing him juggle both huge technical problems that are worth more than a few blog posts as well as most of the business work for the last two years (until he recently hired someone to handle most of the latter).
Of course one shouldn't make this too much of a personality cult and there's always been an amazing team working with him but I can't imagine anyone other than Robert taking MusicBrainz to what it's become today.
It's been a crazy time lurking on IRC and seeing him juggle both huge technical problems that are worth more than a few blog posts as well as most of the business work for the last two years (until he recently hired someone to handle most of the latter).
Of course one shouldn't make this too much of a personality cult and there's always been an amazing team working with him but I can't imagine anyone other than Robert taking MusicBrainz to what it's become today.