I like orals my self esp proviron(year round for me) anavar (heard injectables hurt) and halo.i don think I could replace those three with injectables,all though substitution with a oil is possible and would bring similar results,all those who know my cycles know I do enough pinning and don't need the added oils (lol).
So for me orals are a must esp proviron it puts me in a better mood and frame of mind when I'm on it ,better than any antidepressant imho.