Re the nano wars. This is just my 2c worth, but I have a corporate standard and it is important to pick a standard and stay with it.
1. I never use units. A capacitor is in Farads, so why clutter up the schematic with the unit; resistors are in Ohms, etc.
2. Multipliers replace decimal points, always.
3. Trailing zeros are unnecessary.
4. I never use lower case except for comments.
Examples;
Resistors 100R, 1R5, 10K, 1M, 1M5, 0R002
Capacitors 10P, 100N, 100U, 6U8, 2U2, 3N3, 1N
Inductors 100U
This keeps the drawing clear, legible, and resistant to duplication noise.
Of course there are exceptions which can be dreamed up. If you must use M for milliFarads, which I hate, how do you differentiate it from mega. You do it with common sense. If it's a capacitor and your circuit is smaller than a dumpster then it is not megaFarads.