The 'Little Things' hitmaker has had an ''incredible'' time since finding fame with the boy band - who were put together on 'The X Factor' in 2010 - but hasn't changed with success.
He said: ''What's happened over the last few years has been incredible.
''But I just stay the same person I was and grow up with it.
''We're just normal people doing this abnormal job.''
The 21-year-old singer also thinks he is the ''worst celebrity on Earth'' because he rarely gets photographed when he isn't working.
He said: ''To be honest, I don't get that much paparazzi because you can stay away from it if you want to.
''I'm probably the worst celebrity on Earth, cos I don't go to any of those parties.
''I'll just go somewhere where the paps won't look for me. I don't particularly put myself out there.''
Though he loves being a member of One Direction, Niall does miss his home comforts.
He told Top of the Pops magazine: ''At the moment, if we're not in a hotel room, we're travelling overnight.
''We have bunks on the bus - but it's a bunk, not your own bed. When I go home, I just chill and watch TV. IT's good.''
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