Ok thanks @Delphinos

I believe everyone do feel the same, gets boring with the game, but we see that SP is different, which it is; like a book, with many empty paper, and we can push out our awesome ideas by drawing anything on it. We may suggest you to build something that you never done before, or maybe re-visit old planes and improve them, sure there may be new ideas come, which should help to throw away that boring feel ;-)