Lately I like the Bushnell 4-12X40AO, but it doesn't fit all rifles - it has a huge eye-piece that may block the bolt handle.
Many of my more basic twentytwos wear the good ol' Simmons 3-9X32 Deerfield - a good little scope that is now sold as the Blaser. Doesn't have AO, so at closer distance you have to reduce the magnification.
The Simmons 4x32 is good too, if you shoot at 50 yards or so. I like 6X at 100 yards.
The Simmons Blaser 3-9X40 is alright too. Won't hold zero on a centerfire, but usually okay on a rimfire.