As a bike noob I'd be interested in hearing people's reasoning and experiences when building their ride.
As a noob you will need to consider your skill level with the tools and at assessing the compatibility of parts etc for your ride. The savings that can be had from building your own bike will quickly disappear if you need to pay a bike shop to build for you.
In answer to your actual question, my reasons echo many of those already mentioned.
- Off the shelf bikes don't meet my needs. I have a really specific idea of what I like to ride and how I want to do ride it each time I build a bike. I find trend often supersees practicality as well, which drives the shelf price up. A good example was the 2016 Kona Process 167. Promoted as a freeride park bike and possibly the last big brand 26 inch bike, it came with SRAM 10-42t 11 speed and a ticket price of about $7k.
- Upgrading and modifying them to suit my style of riding is an expensive process. The same goes for replacing the inferior parts that have been stuck into the build by the brand. With online bargain retailing the way it at the moment, building a custom bike is much better value for money.
- I enjoy building the bike. The thrill of searching the internet for the parts that will best meet my needs, working out which will work with what, the extreme joy when the boxes arrive...sitting in the workshop putting it together. It is all a lot of fun.
- having a custom bike/s is way more boss than riding the same off the shelf bikes as everyone else. Get the bike you want first time round.
In the dark times, before the glorious rise of affordable online bike parts (thanks benevolent Australian pioneers like Kerry, Bill, and Aaron along with powerful players like CRC, Jenson and the rest) customise built bikes were a dream of those who only needed 1 kidney. You might fine tune or customise a few options (I remember paying about $700 to put Hayes hfx9 brakes on my first dh rig!) but a total custom build was lots and lots of $$$. Now...the power is with the consumer. Take hold of your right to choose which brakes, forks, wheels, crank, grips, pedals, coloured stem spacers, and even the colour of the nipple thing on the end of your gear cable is!!!
Also if you're really going g to retire the hecklersaurus, I make first dibs on the circus forms and that red front wheel...