Ran irons exclusively till 2003 or so.
Used Aimpoints since, though I went with a stock M16A2 in a few instances here and there.
I'll take an Aimpoint first, but irons-only doesn't bother me too much if i'm not working in the dark.
"And Shepherds we shall be. For thee, my Lord for thee. Power hath descended forth from thy hand, that our feet may swiftly carry out thy command. So we shall flow a river forth to thee and teeming with souls shall it ever be. In nomine Patris, et fili, et Spiritus Sancti. Amen."