The Sea

I was down at Wirrina Cove, south of Adelaide, and tried my ND (solid) filter for the first time to try and capture some silky water shots. Here are the results.
1/200s no ND
0.5s
1s
I guess I find the shots a bit boring. What would you do to make the most of this location?
I would have thought the waves would have been enough to make silky water. Did I really need to go all the way to multiple seconds of exposure for perhaps multiple waves?
Thanks
Daniel
1/200s no ND

0.5s

1s

I guess I find the shots a bit boring. What would you do to make the most of this location?
I would have thought the waves would have been enough to make silky water. Did I really need to go all the way to multiple seconds of exposure for perhaps multiple waves?
Thanks
Daniel