Most alternative people weren't born with the innate gift of 'being alt.' Every one goes through a series of life & consumer experiences which lead them to their current personal brand.
Eventually, we all make the choice to 'let the world know who we are' based on the clothes that we wear. There is a natural progression where we go from 'wearing the clothes that our parents bought for us' to 'the clothes that our parents buy but we choose.'
While the Jonas Brothers aren't a good example of authentic alts, we can use them as a tool to monitor fashion and trend implementation/integration into an 'alternative-ish' personal brand with a core value of 'standing out' by looking 'edgy, yet mainstream.'
////HIPSTER RUNOFF PRESENTS/////
////PERSONAL BRAND TRANSITION://
////FROM CONSUMER TWEEN////////
////TO PERCEIVED-ALT--//////////
////FORGING UR IDENTIY//////////
////ACCORDING 2 OTHERS//////////
Letting people know that you are 'different' starts out with small things, kinda like wristbands, occasional headbands, and stuff that's a little bit post-Abercrombie.

There might be an awkward phase where you aren't 100% sure on what you are wearing means about you.

Being different sometimes means having a 'zany personality', and utilizing faded jeans and HardyBoys-ExpressMen Graphic Tees with metaphorical airbrush designs.

You can't have a zany personal brand forever. Not even Jim Carrey/Will Ferrell could do that.
Then winter roles around and u wear clothes that make you yearn for more than being just 'a kid in a wristband.' You are looking to stand out & show people that you paid good money for the unique, classy clothes that you purchased.

You like how u feel when u 'dress up' and you like the attention. It makes you feel more authentic than 'just another crombie/thrifter/UrbanOutfittedBro/bro in a colourful t-shirt.'

Eventually you can find 'a personal look' that works on a day-to-day basis that you are happy with. You have time to do things like straightening your hair.

There might be some events that you have to 'dress down for' but you can utilize your fashion knowledge to find an acceptable solution, like man-pris.

In the end, you'll find that life is a constant search for the perfect object/accessory to tie around your neck.

Once again, while the Jonas Brothers are 0% authentic, they are a great example of tweens who 'had a desire to establish their personal brand by utilizing progressively non-progressive consumer fashion trends.' While the jBros will be trapped in the '14 year old at a mall in suburbia' fashion phase for the rest of their lives', it's important for you to be in touch with who you were as you transitioned into who you are today.
You may have found an effective way to spend little money to buy unique clothes, or maybe you spend lots of money to buy clothes that help you identify with humanity. However, we need to stay in touch with our 'impressionable inner-tween' and His desire to 'fit in'&'stand out.'
But srsly, if u were gonna meet the President, what would u wear?
[youtube=http://www.youtube.com/watch?v=5e5Z1GewhdY&hl=en&fs=1]