1. Well edited. If you yawn or get the hiccups just cut it or re-do. Maybe even a little bit of a routine to them. I follow Five Two Love and their vlogs have structure and are well edited. It's like watching a very mini episode of a show.
2. Low ads. I don't mind ads as obviously this pays for the vlogging, but they should be minimal and something the Influencer actually uses. Similarly I like hearing them make recommendations about stuff they love which they purchased.
3. Real life vlogs. Hair a mess, kitchen side needing clearing etc is all fine by me. That's real. Fair enough fancy make up and house if doing an ad but otherwise I don't care.