Be careful not to have so much going on, that your guests are having to constantly be looking to see what the next whimsy will be. Sounds like simpler is better. The fish are fine, but is there a nautical or fish theme going on, or is it just another decor item that may not relate to what you already have in the room? If your art on the other walls is fish, or something like that, it seem fine. but if you have the Mona Lisa on one all, an image of castles on another and dogs playing poker somewhere else, it might be time to take every thing down, and try to come up with a theme for your art. For my clients, I always try to group similar things together, and work with colors that are already in the room, the rug or fabrics.

Very happy with it....the matt is a bit more yellow than i wanted so i think i might get that changed....maybe Ill leave it for a couple weeks the forget about it :) But im definitely happy with size and all! can i use this on another wall and the use blue as my accent color or do i have stick in these kinda colors now?

There is no correct answer! We have no idea how tall your ceiling are and what else is in the room. I would take some poster board or even 8-1/2 x 11 paper sheets and tape them up on the wall to mimic the size of the sign. You can then take photos of several options and post them here. People can then tell you which option they think is more visually pleasing.

Don't hang anything higher than the top of the window trim. A clock is pointless on the stairway wall