this is D:OS but Temple of Elemental Evil really had Attack of oppurtunity done right.
I am quite surprised that Temple of elemental evil impress you so much. It was not very popular game, but great I admit. Reason why the attack of opportunity feels correct, as you say, is the AD&D ruleset. :-]
Rogue skills are all touch-range. Rogues tend to have lower HP and attack with a very short range weapon by definition. Should Rogue skills prompt an AoO? Should they prompt an AoO even when attacking from behind?
Should every single thing a warrior does provoke an AoO?
Well, the idea of proper AoO is motivated by Advanced Dungeons & dragons v3.5. (used in Temple of ee btw) It is about Attack of opportunity is provoked by any action which is not suited for hand to hand combat.
That means>
Any attack touch spell doesnt.
Any attack touch skill doesn't. (Rogue's cc)
Any special attack skill doesn't. (Whirwind, cripple, ...)
Any spell does (touch exceptions see above) caster need focus, proper breath, moving hands in proper and precise manner.(Watch the beautiful Rain cast animation.) That means he cant make even simple defensive step to avoid obvious hit.
Any non combat skill does - like threat poison, thread wounds, helping hand. Reason same as for spells.
Any spell like ability like Rapture does. Reason same as for spells.
Any potion use does. Just imagine you have a flask in a bag, so you put it down, put your head to the bag find the proper flask between 30 others. then open the cover, then look up the sky to bottom it up. Well, attack of opportunity for this is quite cheap penalty don't you think ?
Battle radius skills Like Encourage, Inspire are questionable, but couldn't provoke. I think.
