Adele Adkins' retro-soul debut '19' was striking less for her songs than for that voice: a voluptuous slightly parched alto that swooped and fluttered like a Dusty Springfield student trying to upstage her teacher or at least update the rules.
Don't limit yourself. Many people limit themselves to what they think they can do. You can go as far as your mind lets you. What you believe remember you can achieve.