Ive gotten a facination of the evil. Im thinking a Barbarian/Weapon Master/Blackguard or a Barbarian/Fighter/Blackguard...i cannot decide.
Does the first variant get weapon specialization?

Should i go with the boring variant and do a Fighter/Blackguard/Weapon MAster?

What do you guys think? And how many levels of each? dunno myself and if im unsure i tend to get bored of my characters...

I think you need to see a psychiatrist. :D

Only Fighters get Weapon Specialization.

I think fighter classes ARE boring..

why not try thief 13/shadowdancer 1/ Blackguard (the rest).. Elf subclass Drow.

The one level of shadow dancer should be selected as soon as possible (for the hide in plain sight).. make sure you meet the prerequisites of both classes. Think monster dexterity and go for the dexterity epic feats.

learn to use traps and backstab. Also use the occasional spell scroll.