#2 - I like patterns in pictures, so the lines on the bridge got some potential :thumbsup: , but unfortunately, they are not balanced on either side. Not your fault lah, since I guess you're in a bus or car.
#3 doesn't work for me. Not sure what's the theme of this pic? cos it's neither got strong sky nor sea. The 2 little islands on the side seem distracting. Go for either more sea, or more sky - try not to put the horizon in the middle of the pic. Maybe level up the sky a bit to get better colour?
#5 - underexposed. You were using f/2.8 for 1/8s. Try to stop down to something like f11 or f16 and expose for about 1-3seconds. You will see a big difference.
just my 2 cts