How to avoid copy and paste 3D plot options?

I noticed that when I use Plot3D, ContourPlot3D, etc., I usually pass the same many options like this

Plot3D[{x + y, x - y}, {x, -1, 1}, {y, -1, 1},  AspectRatio -> 1, ImageSize -> Large, AxesLabel -> Automatic,  PlotRange -> Full, LabelStyle -> {FontSize -> 18}, BoxRatios -> {1, 1, 1}] 

and

ContourPlot3D[x + y - z == 0, {x, -3, 3}, {y, -3, 3}, {z, -3, 3},  AspectRatio -> 1, ImageSize -> Large, AxesLabel -> Automatic,  PlotRange -> Full, LabelStyle -> {FontSize -> 18}, BoxRatios -> {1, 1, 1}] 

Is there a way to avoid copy and paste all the options?