Ceres is the recommended EU server for new players. Population balance isn't severely off, though VS has the lower hand with 3-5% deficit in prime time, usually for NC's advantage which is similar (or even with TR) based on Indar continent. Inclusive of Esamir and Amerish this deficit increases two- or even three-fold.
There's regular fights on Indar. Esamir has rare medium sized fights, though often has massive population deficits (15%/25%/60% with TR/NC taking the Lion's share of these figures). Amerish is less contested than the other two.
[TTRO]The Terran Order
[IPT]Indestructible Phoenix Team
[DORA] Pandora Project
[xUTx] Universal Toasters
[TFDN] The Foundation
[1VSI] Vanu Supremacy Initiative
 Outfit 418
[GBX] Global Bullet Exchange
[FACS] French Army Ceres Special
(add more Outfits if you know some :D)