1. Keyboard
6gv2 red switches.
2. Key Map
Currently /\12 (/\ being the two keys to the left of right shift in my keyboard layout, 12 on numpad). I often cycle through similarly spaced setups due to keys starting to double tap and so on.
3. Speed/Offset
3.0x and -0.4 judge offset.
4. Visual Mods
My entire monitor screen looks like this when I play:
Not obvious from the picture is that I removed the judgement text (I rely only on the color of flashing receptors and combo). Technically I use column colors too, see item 5.
5. Noteskin
Custom version of the SM Orbular skin to force red-blue-red-blue column colors.
6. Window Resolution
1100x900 (see item 4; measured to replicate my stepmania setup). I use a program called Sizer to set the window resolution and position in one click.
7. FPS/Refresh Rate
480.
8. Headphones
Either grado sr225i or arcano shp80 (a br modded & rebranded Takstar Hi2050).
9. Secret to gettin gud
Play my files. Alternatively, play more.