I usually do a new champ like this
1 bot game to get the feel and make sure what I want to max first (Usually a brand new hero who doesn't have a decent guide yet).
After that I spam normals until I get good with him. Sometimes Dominion if I feel my pvp skills are lacking but my laning is decent.
Other than that freaky builds and messed up things are only for bot games/having a good time with friends