Death Knight's Food!

I'd like to know which classes the DK can have for Dinner :D ...The title isn't literal.

Which classes are weak against a DK? I'd like to know for Unholy and especially, Frost DK.

I'm around Lvl 72 right now. I've seen Warriors, Paladins + Every Caster run from me when they see that I'm questing in the same area as they are (Same leveled ones) It's probably because they're bad at PvP (Sadly, I am as well!) Of course, other DKs never run.

On a side note, I was trying to run for a dungeon in Outland as a Blood DK and an Orc Warlock simply 2 shot me. Warlock is the class I know the least about but he was definitely Dest. In Northrend, another Warlock was camping an Alliance DK (Same Level as me, for both). This time, it took me 3 seconds to kill that Warlock as a Frost DK.

A list of classes + specs would be nice for both Unh and Frost. Though, I think Locks aren't much of an issue for a DK as Spreists and Mages are.

I never try to attack a Paladin. They'll out heal me for sure. Warriors, they're fun!

While leveling I use a standard Pvp spec, first maxing out the main spec then investing in the offspec. So for lvl 72 It would look like this:
https://wotlk.evowow.com/?talent#jZMgZfMGI00dgfuzbucqo

As DK while leveling u should be raping almost any other class. That is if u know what u are doing...
Kiting is the key to winning most melee classes, and timing ur defence cooldowns is a key to winning range classes.
When it comes to Casters: Warlocks, Mages, Priests, Druids with the right use of Pet Stun, Silence, Anti Magic Shell u should be raping them the easiest.

I would advise u to go with this spec:
https://wotlk.evowow.com/?talent#jZG...GI0odgfzzbucqo
and finish it like this:
https://wotlk.evowow.com/?talent#jZG...GI0odgfzzbucqo
last 2 points can be put in Desolation.

Constantly be in Unholy Presence.
When it comes to PvE, while questing and leveling, u can pull a lot of NPCs, spread diseases, and place DnD while kiting them in circles thx to Desecration.
After ur runes are fully refreshed, use couple of Death Strikes on remaining NPCs to heal up if needed.
In dungeons, just make sure spread diseases and pop DnD on trash, spam Scourge Strikes and Blood Strikes with Death Coils on Bosses while Gargoyle is pounding them.
If u want to tank dungeons, just go Frost Presence and u should be fine.

https://wotlk.evowow.com/?talent#jZG...GI0odgfzdbucqo
This spec is great for farming and world questing, and pvping in BGs after u reach lvl 80 aswell.

U should read:
http://forum.warmane.com/showthread.php?t=316091

Its great PvP guide that can give u some insight in how to Duel/face certain classes, make macroes and so on...

As for Frost, my advice would be:
Skip it completely when it comes to PvP.
Use it in PvE for raids mainly.