Sexy daggers
Corrupted Shard has an icy particle effect. The new black lion chest daggers do as well, but forget that. There’s also the asura-style stuff: Peacemaker, Dark Asuran, Inquest, Glyphic, and Mystic.
(edited by Vargs.6234)
Also Ascalon catacombs – Ghastly daggers turn blue and smoke at night.
http://dulfy.net/wp-content/uploads/2013/03/gw2-ghastly-dagger-2.jpg
[NOX] & [Coma] – Gunnar’s Hold.
Dagger of the Dragon’s Deep, Orrian Dagger, Adamant dagger, CoF dagger, Fused Dagger, Destroyer Dagger, Claws of the Desert, and Moonshank all look nice imo.
This is all in addition to previous suggestions above, of course.
Inquest daggers both look lovely and have a nice red lightning effect along them, mystic spike is similiar lookswise but is blue lightning instead of red
Corruped shards
Glow for like 20 seconds after you use an skill
http://dulfy.net/2013/03/11/gw2-dagger-gallery/
For screenshots of most daggers in game (Also how to get them)
Alternatively, you can go into the Mists and look at every item in the game (Aside from Legendaries) in the PvP lockers.
There’s two kinds of people… The quick and the dead”