I have nearly been a member for 3 years, when i first joined Hetalia was non existant. Anime like Vampire Knight were the hype then. Hmm yeah probably Hetalia/Kuroshitsuji( and i think Naruto has gotten more popular idk or is that just me who see's that XD)
I haven't heard about Hetalia until,like,6 months ago? XD Anyways,I think that one grown onto popularity,along with Soul Eater,like you said. But besides that,I think also Naruto? I mean,I am hearing and seeing about it more than usual.