I don't see how you can maximise the full potential of a DSLR with just the kit lens.
Well.... if the kit lens is not good enough for you, then, it is up to you to decide if you should get a DSLR or not.
I started out with kit lens and moved on from there.... I think photography is a long term hobby and you grow your system as you develop your skills, and well, I started out with film and fortunately, color was not so much of an issue then......
Digital sensor is more sensitive to type of lens used I suppose, but still, a DSLR itself allow you to explore the various different type of shooting style and it is up to the photographer that is limiting the skills development.
Some will think it is the lens that limit their skills, some think it is the camera body.... In this forum, I feel..... there are more lens collectors and people who like to show others what equipments that they own than their photos....
A real hobbyist/ photographer call would be advising you to get DSLR, start out with the kits lens and develop your skills and grow your system on a you can afford basis.... a kit lens now seems like a rubbish that cannot take any picture at all??? How pathetic.....
A kit lens color is definitely not as rich as a L and to suggest that the kit cannot take decent picture is rubbish. It is the man behind the camera. Well.... I think I should give up on this debate, as not many will understand what I have said anyway.
Having been away from here for a long time... so much have changed here.