When I was a beginner three day full body routines were all I done.
My favorite right now is upper body/lower body with 2 days for upper body and 2 days for lower body. The way I set it up is like this
Monday- Upper Body, Push Dominant, horizontal push/pull, vertical push/pull, triceps
Tuesday- Lower Body, Quad Dominant, 2 quads, 1 posterior chain, 2 abs
Wednesday- Off
Thursday- Upper Body, Pull Dominant, vertical pull/push, horizontal pull/push, biceps
Friday- Lower Body, Posterior Chain Dominant, 2 posterior chain, 1 quads, 2 abs
Or I'll do this.
Monday- Horizontal Emphasis, Vertical Maintenance
Tuesday- Posterior Chain Emphasis, Quad Maintenance
Thursday- Vertical Emphasis, Horizontal Maintenance
Friday- Quad Emphasis, Posterior Chain Maintenance
One or the other. I'm on a full body right now to break a strength plateau, which I've already done, but upper body and lower body (4 days) are my favorite.