OriginsRO is the server I always wanted. A progressive Old Times server (3rd jobs won't come, sorry). There's some cool balances/changes (justified on their wiki) and it functions just like an official server. You can expect some different things from official servers. The economy is balanced and active, zeny is worth farming, since almost always you'll find what you want to buy. You can multi-client, but parties are even better. GVG seems balanced (didn't tried yet) and no donations/ROPS!