My friend u have a nice wallpaper site.i want to give you some tips...to much wallpapers in home page..i think 14-16 is good...i have wallpapers sites for 3 years...if you want incrase adsnese revenue put baner 460 under wallpaper preview top of resolution selected..works very nice...have a nice day!
good domain I would say, yes you need to limit the wallpapers on home page like wallpapers from all categories are showing up. Try to show new wallpapers on home page instead.
Is this compulsory? Apart from this.. i would say .info is one weak extension. Rest is Perfect to start earning!