Why not make it level based in much the same way that hit/damroll, stats, hp/mana/mv, ac, and saves are presented to the user...

That way, you almost get the best of both worlds:

1) The person still gets to know their % stats at a high enough level.
2) The reduction of spammy practice due to inability to determine what level something is at.

Plus the additional bonus of low level players not knowing so much about various things such as:

1) skills affecting other skill's percentages (i.e., berserk)
2) items that affect other skills percentages (i.e, that dagger that increases your stab ability by 10% for instance(*NOTE* I made this item up, please don't go looking for it.))
3) Exotic weapon skills are a bit more unknown.


I like the categories you've listed above, with the exception of the Masterful range. I'd just list Confident as 85%+:

1% = "Not practiced"
2%-60% = "Practiced"
61%-84% = "Skilled"
85%-100% = "Confident"

Then, after that, you present actual skill percentages at say...level level 35 (five ranks after you find out your actual HP numbers although most people know these anyway from level gains).

What this does is encourage ranking, discourage practicing past the confident level of what could be construed as 85% (it would suck imho to even consider trying to practice past the first time I saw Confident since who knows where you hit 100%?), and still gives level 30-35+ characters (where arguably, the class specific skills really get interesting for a lot of classes) the ability to bone up on what skills they find out they're struggling with. This assumes that again, practice improvement messages would be turned off, with the exception of the 'insight' messages necessary for invokers/assassins to learn their new skills.

It also assumes the whole thing is worth it. Arguable at best.