I personally like playing on PvP realms because I like the very chance that someone could start a fight nearly anywhere nearly any time. ;)
I am not someone that attacks lower level players (no challenge), and I don't always start the fight, but I'll at least try to finish it and have many times when someone has thought to catch me by surprise. I've also had my fair share of dirt-naps too and all I do is dust myself off and keep going.
Let me see, you play horde, am i right?
Blizzard don't care for faction balance, and now, in most of the old servers, like Warsong is simply impossible to "World PVP" since there is always 5 or even more hordes for each ally.
Funny thing is, the first time i played in my server, it was around 50/60% alliance, things changed after TBC and the introduction of blood elfs. Now it's what? 90% horde?
I've played both in PvP. You're diverging into a whole new topic beyond just PvP though. You're into Faction balance, and while that's often a topic of concern for people, there is no one way to ensure perfect balance in world PvP. Even if the two factions are perfectly balanced, there's no guarantee you won't be outnumbered in a particular encounter. The only way that "balance" is ensured is via the battlegrounds and Arena.
One of my favorite PvP moments involved being outnumbered out in the world with just myself and two others. We held the location vs. 10 times our number (they came in waves) for at least 20- 30 minutes. Am I exaggerating? Who knows, I was too busy to give an accurate count, but another party member was keeping an eye on the numbers. It was fun no matter what the odds were.
The thing with PvP is that people often want different things out of it. There's no one way to satisfy everyone. I'm more "old school" and don't care about rewards or gizmos or gadgets. I just want to PvP for its own sake and I want it against someone who may possibly beat me. It's often much better with a group too. That's me though. Others like the ability to earn rewards and like gadgets and gizmos.
PvP gets a bad rap sometimes and it's because no one really is settled on the definition of "true" PvP. And those that don't like it, merely see the bad in it. The great thing about WoW though, is that we've seen many people who would have never tried PvP before, giving it a try and finding they like it. I call that a win for PvP. Discounting those people or making them feel unwelcome isn't going to help though. Saying that just because someone doesn't like to gank or be ganked they shouldn't be in PvP likewise isn't helpful. PvPers should be letting people get their feet and find some confidence so that there are more people to PvP with.