In the sagas I've played in, major characters are typically made with the idea of exploring a niche of play, and its relevant mechanics. How does one design and play a hermetic cuisine expert, an infernally tainted artist, a faerie-trained incomparable spear maiden, or the abbess who wants to become pope? I think this is actually quite common, as folks write about "blasto-mage" or "rego crafter".
One concept that has recently surfaced in our troupe (initially as a joke, but we found the idea interesting and challenging) was that of the "vanilla magus": the plainest, least unique magus possible - unique in fact, only in his utter lack of any characteristic trait. A character without any particularly unique virtues or flaws, who will be moderately ambitious but not too ambitious, who will have a staff as his talisman, a cat as his familiar, and an apprentice who'll pass her gauntlet with exactly the same number of xps, spell levels etc. as a character created with the "standard" character creation rules.
It's actually less trivial than it sounds.
For example, what would the "right" characteristics be? Should one take the flaw weak characteristics twice, and have a character with +1 intelligence and all other characteristics at 0?
A particularly tricky question is: what would be the best hermetic house for such a character? I understand that in some sense one could make a vanilla magus from any house. But the fact is that some houses are more idiosyncratic than others, and a magus from such a house cannot be both average for the house and average for the order at large. In fact, all houses have, to some extent, some unique traits, so the "vanilla magus" is not perfectly attainable. But it's easier, I believe, to make an "anonymous" Guernicus or Jerbiton than an "anonymous" Bjornaer or Verditius. Any opinions?
Another tricky question is: how should such a character focus on the Arts? One possible view is that he should be a generalist, privileging no Art over any other. But that is itself a remarkably unique choice: virtually all magi specialize. What would be the plainest possible curriculum for the vanilla magus? One third of all xp in one form, one third in one technique (avoiding particularly remarkable combinations like Intellego Aquam or Perdo Herbam) and one third evenly distributed among the remaining Arts?