Has anyone struggled to find their niche?

[StraightUpIrish]

If you can't enjoy a certain niche then have you thought into whether youtube is for you

 

[Oliver Potter]

So since you are a Vlogger and the very nature of a vlog channel is that it is personallity based, i don´t see where the problem lies. Your viewers watch you because of your persona. They will keep watching if you do some other content, every Vlogger does a wide variety.
If a gaming channel suddenly stopped playing games that would be awful. For you its not. Go for it. Do what you want !

Thank you, that comforted my soul! haha!