Go SN... dmg is all dat matters, and they turn into dogfighting tanks

I use sn FP and DB they may be a little slow but good sn T3s fp are good T4s even better fun nation in my book i like these nations for DBs in this order
SN slow but most damage and can easly shoot down weak fp at higher lvls
IJN faster and 2nd most damage in game
US good all arond good speed, damage, fuel best FPs
UK fastest DBs damage a little weak thogh

DBs are DBs any nation works as long as you konw how to use them

SN is the best one currently, slow but powerful. And with some good pilots can kill some lower tier fighters

IJN is good for it's speed, although weak defense.

UK can be tanks, but the damage is deplorable. TB's are the better choice for UK

KM was the best before it got hit with the CV patch a long time ago. Now it's just meh, still better then US DB's though.

MN had some good ones but it got nerfed, not sure where they stand now.

US has average all around, but has better TB'ers.

I heard RM was pitiful, though I have no first hand experience with them

I am so tired of all these repetitive threads popping up on plane advice...

USE THE SEARCH BAR!!! 

I wouldn't worry about the nation.

As long as you're helping your team lose, that's all that matters.