User interface design in general is a fascinating topic. It's a rather fine art. In my opinion, Yamaha does an impressive job most of the time. Certainly compared to other keyboard companies. The absence of a numbered keypad (and, for that matter, numbers altogether) might be annoying to those who are used to just punching in numbers quickly. However, the fact is that any numbering scheme would get tricky when it comes to integrating user styles (flash or disk). Think about it. If you were designing the PSR-2000, how would you work in a numbering scheme that works for user styles as well? Having numbers for ROM styles only, and only names for user styles, would be inconsistent and quite confusing. The same is true for user voices. In any event, proper use of the Registration Memory should alleviate any quick-access issues.