My Napoleonic French army is surprisingly light on Imperial Guard. I have five stands of infantry and three of cavalry, which was what I needed for my Borodino scenario fifteen years ago.
My heart is always with the line infantry soldier. If I don't need an Imperial Guard figure for a scenario, I don't paint it!
I do have a scenario, however, that includes a substantial guard presence. General de Brigade's "Glory Years" scenario book has three linked Austerlitz scenarios. My group played the first of those back in December. The third scenario has the French player field 20 Guard Chasseurs a Cheval, 32 Grenadiers a Cheval, and 3 stands of horse artillery.
I painted these figures up in a day. Because I only had one stand of line horse artillery in my lead pile, I painted it up at the same time as the guard.
I'm enjoying painting French Napoleonics for myself, but I may take a little break in a bit.