Quoting BobaFett 2
(...)but only the top and bottom should be necessary to get a good picture.
If you want to get comments and constructive criticism from other users here, the more different angles of your creation you show, the better. Because although someone may not like the shape of your spaceship, if he/she is able to see all sides of your MOC, that person might like how you did the canons, the underside or the greeblings you created near the engines, and tell you about it.