Looking to get back into the fray

[Anova]

It really depends what kind of endgame experience you want. As far as I know though, Leviathan is one of the more populous servers. Endgame raiding is very active on the server and the economy is very strong (the server ranks among the most expensive for housing prices, hence suggesting average player wealth is relatively high). There's a number of helpful linkshells for lowbies as well, but I would say those are largely in decline as most new players have difficulty creating a character on the server to keep those groups going.

I might suggest Excalibur for competitive endgame raiding, and Balmung for the RP community as popular servers if those interest you.