Is this person new to the ideas within D&D as well, or is he familiar with the tropes of clerics as religious folk in a polytheistic land, and casting "white" magic, wizards casting fireballs and
summoning undead, and thieves skulking down corridors and shivving people (bad guys, hopefully) in the kidneys when they aren't looking?
The one thing I'd warn about 3.5 is that the simplest ideas conceptually (big knightly fighter with weapon and armor, armor less martial artist laying down the crouching tiger, etc.) are not the easiest to play (and certainly not the easiest to make survivable).