yeah as long as the bike is safe, solid and well put togather it's good.
I like to see the custom built bikes with a lot of hand made parts, different gas tanks, custom paint, etc.
i know that not everyone has the tools, or ability to build a custom bike, but i think that some simple custom touches can make a bike your own, and stand out from the crowd a little bit.
even just painting the gas tank will make it look a little different than the rest.
i guess it's because i like to do things different. I will never build a mountain bike or a cruiser with a motor on it because that's what everyone else does.