i am newbie to linux about 1 and half years only, but i always think to build own distro
With all due respect...but, is'nt that a tall order for a (self-proclaimed) newbe?
May I suggest deepening your knowledge by studying the insides first? Try to set up a Linux from Scratch
, for example, just to see that the nuts-n-bolts look like.
That way you're more likely to get results, instead of bumping into dissappointments due to a lack of grip on the basics...