G'day,
Don't shy away anymore, these are really good... All have stunning color, assuming a polariser was used?
#1, Great lines, tempted to get lower so the left railing is more of the subject and higher in the frame, horizon same level but the rails higher (if you know what I mean doh

), hmmm might be tempted to darken the top 1/3 of the sky with a gradient (overlay blend
mode) it'd even up the darker blue area too, would also lessen the highlight on an edge of a frame... Terrific lines and shadows in the water...
#2, terrific sky! Needs something more in the foreground/middleground though, but not sure what... sorry
#3, This is another good'n. something about the sand is distracting my eye though, try cropping the sand out from the bottom and just past the second pair of pylons of the pier on the right, see what you reckon...