Easy way to get "Fistful of love" Achievement.

[Svej]

Fistful of love (Fistful of Love - Achievement - World of Warcraft)
Queue up for Alterac valley, you'll see a lot of the race/class combinations from your faction, before the gates open. Throw roses at them if see anyone that's need for the achievement.
You can also check the scoreboard for the opposing factions to check which combinations you need.
This took me about 3 alterac valleys to get the achievement.