What to Paint?

 I have three blank canvases size 18x24.  These can be a series, or 3 different subjects.  Some subjects might work better in a larger 30x40 size.  HELP me decide:

For the three existing 18x24 canvases should I paint

A Three Taylor Twins in Marin Paintings (ie top 2 candidates above plus 1 more tbd)

B Three Ocean Gull paintings (ie 3rd photo composite above + 2 more tbd)

C Three Flower Fantasy paintings (ie 4-5 photo composites above + 1 more tbd)

D One of each:  Photo 1, 3 and 4 

E One of each:  Photo 2, 3 and 5 

 

OR should I buy two more 30x40 canvases and paint

F  Two large Taylor Twins in Marin paintings and use the 18 x 24 canvases for B or C above

G  Two Flower Fantasy paintings and use the 18 x 24 canvases for A or B above 

Please Pick A, B, C, D, E, F, or G and help me decide!!