Drg is more than capable at putting the hurt on something. In abyssea, both sam and drg get the short stick on procing as they can only do a limited number. Blu gets even less, but they are also used for magic procs so a hair more popular in that regard.
Otherwise, your kinda vague on what you are looking for. Party and a little solo? Both blu and drg have plenty of solo and party capability. Drg is the stronger DD compared to blu. Id say generally has an edge on sam usually as well, but its not like night and day. Blu is a great deal more versatile as sam and drg are pretty much just fit the role of beatstick for most content.
Im not sure what else to tell you. Drg is a very capable DD with a bit of solo potential via /mage running over weak-ish mobs, but you wont be soloing any HNMs or anything. Obviously we, the drg community, like drg.
If theres any reason to tell you to play drg its in your own words:
I love drg since launch just never got it
If you 'like' the job, then play it. If it turns out lame, stop playing it and try something else. As long as you like the job, keep playing it.
Aanalaty, Mithra of San d'Oria
99Thf/99Drg/99Rng/95Pld/Secret Job 92
Maat-1/1 Thf Meleed (pansies steal)
Some of mah gearz: http://www.ffxiah.com/player/Lakshmi/Aanalaty#item-sets
Join 'People Against The Heart Snatcher' and help put Thfs on the right P.A.T.H.S.