I don't get the comments from some that the best VTA is always near parallel.
Me neither. It depends on the cartridge. Shelters like to be a bit tail down, ZYX's like to be level or *very* slightly nose down. Other cartridges would like other attitudes, depending on their construction and stylus profile. Since there can be manufacturing and age-related differences from one cartridge to the next, even two cartridges of the same model might prefer slightly different attitudes. I agree there's certainly no "always" about it.
Seems most cartridges in my system like to be somewhat tail up. Perhaps it is because my 10t's are kind of difficult to tame in the lower frequencies. I am finding that I usually have to raise the arm to focus the bass, which is great cuz the HF seems to like that.
Here I think we part ways. Except for really gross movements VTA/SRA adjustment is not a tone control. Taming your 10t's bass is not the job of your cartridge or tonearm, its the job (primarily) of your amplifier.
Read Lloyd Walker's VTA/VTF tips again. He does mention tone control-like effects, but only as the first step in setting arm height. With most cartridges there's a pretty wide zone of height settings that yields neutral tonal response. Once you've identified that zone you're not done, you're only getting started.
The most important sonic effects from VTA/SRA changes occur with *very* tiny adjustments inside that tonally neutral zone. These tiny adjustments typically have no effect on tonality at all.
Even some guys with entry level rigs hear this. Check out the many VTA/SRA posts by 'jnhvac' on VA. His ears are way better than his rig. He hears exactly what Lloyd Walker describes on his MMF-5/Goldring 1012GX. He uses playing cards too BTW.