It came to mind this morning at the Daily Office that we refer to Michael the Archangel as "Saint Michael" — but that he isn't a saint in the normal sense of the word. Everything about Michael and the other angels is a bit out of the normal, of course. I suppose in the long run that "Saint" here means "Holy One" — as in "Ye Watchers and... " since "Watchers" is also an old name for the angels, as is "sons of God" (see Job, in the NRSV reduced to "heavenly beings.")
Of course there is that old image of the departed "getting their wings" and becoming angels themselves, in the fashion of Clarence from It's a Wonderful Life. Jesus himself observed that at the resurrection those deemed worthy of it would be "like the angels" (attested by Matthew, Mark and Luke; while John does the reverse to have the angel declare that he is only a fellow servant...).
So the long and the short of it is that the heavenly realm is well-populated, and we hope one day to join the population. Whether we become angels or get a work-permit, there will be the endless work of praise to do. In the place beyond time and space, the placeless place, we hope to rejoice forever in timelessness, in pure being-like the Ground of all being, the Three-in-One whose only deed is Love.
All you saints and angels, praise the Lord! Alleluia.
Tobias Stanislas Haller BSG