I started playing a while ago, stopped to search for a better one, then came back because of the lack of good MMORPGs. The greatest thing about runescape in my opinion is the diversity of gameplay with many different creaturesto battle and more then one option for almost everything. You can play for free or pay monthly and you can upgrade and downgrade anytime you want. Addictive, fun, interesting and though the graphics aren't the best, they are clear and it is easy to see what things are. Unlike alot of games you can play at your own pace without holding up the world around you (played in realtime) wheres in others of its kind you have to either constantly plan or constantly battle.
I gave it 5 stars, comparing it to the others in its catagory.