I really like Wonder Trade :) I haven't used it in Alpha Sapphire yet because of the lack of WiFi in my current situation, but I used it very often on X. Got some neat Pokemon like a lot of HA Pokemon, some even with Egg Moves I can sure use! :)
Don't expect anything like an Arceus with an appealing nature or something, this just doesn't work this way. Wonder Trade is meant to trade a Pokemon, and get something in return you might not expect. Yes, a lot of people use it to trade Magikarp, Scatterbug or Fletchling, but like more people already said, even though YOU might not want to use it, another person will, so just Wonder Trade it again :) That's all the fun of Wonder Trading.
Besides, it's always been a blast for me, even when I received a Magikarp once called "U Mad?" hilarious xD I too use it when I have double Pokemon or leftovers from breeding : ) Usually those are Pokemon like starter-Pokemon or something, I always like to think a trainer who just started the game received them or any other trainer who is trying to fill up the Pokedex :)