I don't kn ow about flavours but colours are referred to when frequncies are boosted by the preamp circuitry. Usually this is a characteristic of tube preamps. Keep in mind though that these things are subjective and the majority of people can't tell the difference between a voice recorded with a Neumann U47 thru a Neve proamp and a Radio Shack micropone recorded straight to the 8 track. Although coloration can be nice, people have spent many years perfecting preamps and microphones with flat responses because they want to maintain fidelity. This is something that has only truly become feasable in the past two decades. If you compare a classical recording from the 60's to one recorded this year you will find the current recording far more immersive. This is of course subjective, and many would argue. In the end, do you want transparency or colouration? You cannot easily have both.
Colouration for the most part would be considered a flaw of the circuitry, although often it can produce desireable results.
There are no tricks. It's a matter of trying out mics to find out which one works for you. Take several mics and several preamps and listen to them side by side. Try different pairings between mics and preamps.
I mean one mic, one preamp together. Don't liook so deep. It's not nearly as mysterious as you think it is.
You could use about any effects processor or even a tube guitar preamp with built in effects to add color to your signal path. Even an Equalizer will give you plenty of color and flavor,
joe
Not really a D.I. box is designed not to color your sound. It allows you to connect to the board to match the in's and out's.
joe
I'm not understanding just what your trying to achieve. If your looking to color your sound their are plenty of units that can do this anything from preamps to effects. And how you patch them in to achieve different results.
Joe