Let's see...
- No weird customizations (wings, "balancing items", bla). I like servers that have "RO" atmosphere, not "RO looks but nothing to do with it" feeling)
- Rates around the 20's
- "1 arrow/bullet" feature (not having to bother with going to and from to get arrows/bullets is great... so sue me :p)
- Good community (I hate those servers full of dicks)
- Censorship and enforcement of Rules of Conduct (yes... because I hate forums where everybody trolls around, only says crap and posts porn.)
- Stylist (with decent palettes please!!!)
- Custom Item shop (that gets in one place things that are spread in the item shops of all the towns).
- No corruption (I can dream, right?)
- Decent GM's (They don't have to be online 24/7, be kawaii or fluffy or "nice" or anything of the likes. Just get online a little to let people know they're there and doing their stuff).
I think that's about it...