Mac Miller doesn't want to feel happy all the time.

The 26-year-old rapper insists he doesn't want to feel ''depressed'' but he wants his life to always have highs and lows.

He said: ''I really wouldn't want just happiness. And I don't want just sadness either. I don't want to be depressed. I want to be able to have good days and bad days ...

''I can't imagine not waking up sometimes and being like, 'I don't feel like doing s**t.' And then having days where you wake up and you feel on top of the world.''

The 'Self Care' hitmaker - who released his first album, Blue Slide Park', when he was 19 - admitted he was convinced he was going to be the ''biggest thing in the world'' when he first began his career, but these days he's happy to just be making music.

He told Vulture: ''When I first started, I thought I was going to be the biggest thing in the world.

''There was this time when I was the most Googled thing on the internet. It was like 'diet, carrots, and Mac Miller.'...

''I'm less concerned with being king of the hill [now] than being able to put s**t out.''

Mac - who previously dated Ariana Grande - admitted it can be ''annoying'' when people approach him in public but he understands that it's just part of his job.

He said: ''It's annoying to be out and have someone come up to me and think they know. They're like 'Yo, man, are you okay?' I'm like, 'Yeah, I'm f***ing at the grocery store.' You know? It's the job. This is what I signed up for. So, you just have to not.

''You have to have your own reality and that has to be the driving force of your life. Do I wish that every single thing I did when I was 19 wasn't a discussion? Sure.''