6 suprisingly useful things to switch up while testing a PT preset

6. MIDI keyboard. May reveal problems with your main board.
5. Computer. This includes the physical computer, but also other non-PT-specific things like Sample rates of the DAW, and/or the Soundcard, volume levels in the same, other weird things in routing.
4. Environment/audience. Different room tones and other settings re-focus me on various aspects of tones. Feedback can be very helpful.
3. Headphones/speakers. I'm shocked by how different different products are in their responsiveness. Do parts of the upper 2 1/2 octives sound really loud just because I'm using earbuds instead of speakers? Mind blown.
2. Tuning (Diapason (Hz)): Makes me honest about notes that I'm not sure if they no longer sound too loud or if my ears just adjusted and are momentarily less sensitive to a frequency.
1. Target sound recording. Both type of reference (e.g. directly from a solo pianist, vs small ensamble vs digital piano demo) and specific recording. This is especially important for me if I have spent a while just focused on the preset's sound itself.

What are some of your favorite things to switch up when designing a sound?