Creating an abjurer and overthinking areas of effect because of Protective Ward. I note that it is a "10-foot-radius burst centered on you" one of only four powers/spells that have this phrasing or something similar for area (see below). I wondered if these should maybe have Aura area of effects, instead, since bursts generally tend to be centered on an intersection (assuming grid play). The description of Protective Ward even refers to it as an aura.
Moonlight Glow (60-foot burst centered on you)
Protective Ward (10-foot radius burst centered on you)
Sanctified Ground (30-foot burst centered on you)
Weakening Ground (30-foot burst centered on you)
Looking for other similar examples, I note that Globe of Invulnerabilty and Prismatic sphere specify 10-foot burst centered on one corner of (or within) your space.
Smokestick and Dust of Appearance specify the burst is centered on a corner of a space.
Anyway, just curious.