Here are some general Sims 2 sites that you can download CC from to improve the quality of your Sims. I myself prefer creating Custom Hetalia Sims instead of the direct download from LJ, though those have come in handy.
HETALIA SIMS: rechter-sims.livejournal.com/ There are currently three sets here.
PAYSITE CONTENT: ls.paysites.mustbedestroyed.or… Because some of us can't afford shit to fancy our game, let's steal it! [It's legal, in the EULA it states Content creators in no way can sell what they make for the Sims] Narrow down to either "TS2" [Sims 2 lol] or "TS3" [Sims 3] and then narrow down by site, type of content and look around for the matching download.
www.modthesims.info/browse.php? The biggest collection of CC for both the Sims 2 and 3.
-- www.modthesims.info/member.php… Doll-like skins, I use them and they're amazing.
-- www.modthesims.info/member.php… You can download Russia's scarf directly from the creators page and get a look at his other beauties ♥
www.raonsims.com/main/main.php Great source for Male and Female hair. It's a paysite, refer to the top for that.
www.rosesims2.net/ Another great source for hair, includes Sims 3 content. Chinese based site, so she has a lot of Chinese/Asian centered clothes/hairs/lots. Pay site though, there are some nice hairs for free.
www.peggyzone.com/ She makes good hairs as well. <3 Pay site though. So refer to top second link.
www.coolsims.net/?show=home By far the best! All hairs on Coolsims are 100% FREE.
blog.daum.net/janita &nbs… in love with Janita's sim creations~ Hairs, makeup, all that, it's gorgeous!
adelevk.com/sims/?page=main Amazing sets, clothes, all that jazz, and it's free ♥
simsinparis.net/news.php Gorgeous sets, they look amazing in game!
www.parsimonious.org/ Many different clothing styles to choose from~ Sims 1/2/3 here!
dsb.g.ribbon.to/ I love this creators cat ears and bunny ears! You could make Bunny!UK here if you wanted.
www.milanosims2.com/ More clothing~
www.justsims2.ru/ Sims 2 and 3 content! Great site for more clothes!
tesi871.blog102.fc2.com/ Sims 3 Hetalia CC! Amazingness~