Well, obviously, i think that anyone who makes a playerworld, would be makeing their world into what they believe is the best...
and I am no different, so really, i think the best player world would be like this:
1. tileset - i like the origional tiles, i really do, but a lot aren't that great, and could be improved, or replaced. But i think that the basic tiles (grass, trees, and such) should not be changed.
2. bodies - i like the origional bodies and such, i don't see why people have to change them =0
3. levels... must be VERY good... VERY detailed, and NO tile errors... i am EXTREMELY picky with levels (as my LAT's could tell you)
4. quests - make them interesting, and not all the same style... NO pot/bush/sign mazes, or those invisable mazes... or riddles that are impossible to figure out... i actually don't mind fighting baddies, if it actually challenges you. I don't think that all quests should be fighting things... maybe 25% fighting, and 50% mental work, and 25% 'physical' work (like moving around the server, or doing something that takes your time)
5. the server should be playable, without you having to do the quests. the quests are PART of the game, not something you are required to do...
6. there should actually be an economy... money should be worth something... but not so much that that becomes all people care about.
7. environment - the whole server should 'feel' the same.. same overall theme, and everything.
8. no empty space! no empty levels, or pointless buildings, that have no inside... none of those "contact ___ to have your house here" and such...
9. events and activities - lots of different kinds of events, and prizes. there should also be side activities, and games that people can play by themselves, and don't need an events person to host them.
10. an honorable, and modest staff. hard workers, who i can trust. a large, and experienced body of staff, to get things done, and done right.
11. updates - there should be somekind of noticable update to the server daily... give the people something new to look forward to... but don't make the updates obviouse... they have to explore to find them
those are just what my idea of an A+ server would be like