Oo nice! Seems you like the starter Pokemon then? :D I love Infernape, especially due to the anime <3
My top 5 are: Buziel, Sandshrew, Dwebble, Sewaddle & Grimer <3 But I also love Pachirisu, Stunfisk, Piplup, Foongus, Drifblim, Roserade, Boldore, Leavanny, Sneasel, and basically tonnes more. xD
In order to put background images in your profile you need to either be a member of staff of a Community Supporter (someone that has donated money to the forum), so unfortunately you can't at the moment. D: But profiles can still look great without them! c: