A 3-round or 5-round mag is just fine for me for hunting; enough capacity and little or no impact on handling.
A 10- or 20- or 30-round mag is huge fun for plinking...as long as it actually holds 10, 20 or 30 rounds.
Like any good Canuckistani, there is little that I detest quite so much as a neutered "high-cap" mag that holds 5 or 10 but looks like it could, and originally did, hold far more if my gummint didn't hate me.
But my personal WTF-meter really redlines when I see folks purposely buying faux-high-cap magazines because they think they look cool. All the awkward handling of a 30 "banana" mag or even a single- or dual-drum mag...pinned to 5-round capacity; the worst of both worlds. To my eye, that horrible little silver dot...the rivet....visible just below the receiver, but with a huge gaping empty metal magazine extending far beyond it...isn't cool; it's embarrassing, a constant reminder of what it's like to own guns in this country.