In reply to Chris Abri: What's wrong with standing sideways? It should be perfectly possible to belay safely standing sideways so long as you remember and apply the fundamental belay device/braking hand/dead rope principles.
If you ever go climbing outdoors you will very likely find yourself having to belay in all sorts of different orientations depending on where the anchors are, how the ropes run and where best you can position yourself for a view of the leader/second.
Although there may be a few particular circumstances, such as James G indicated, in which anchoring to the back of the harness
may be preferable, in general it is probably better to bring everything to one place ie belay or tie-in loop.