Agree, there is a fine line between enough to cover and enough to look bad
Have you gone to the dept store and done a counter color match? Its fun, Ive done it twice and everyone was very nice and helpful.. (they want your money, lol) It will give you a good idea what you can look like when done well, and get you to the right colors... as well as getting pointers while they do it.
I also have found myself removing half of mine and it looks better
I have begun using very little now and its a much better look
keep going, have fun!