ryushare for sure. i'm an early adopter, nobody trusted them in the beggining because of the weird domain name. they survived the paypal remove and they still rebill with their new vietnamese bank gateway.
yes they delete lot of copyrighted files daily but you get automatic report of deleted files everyday at midnight. at least they wont delete your account and keep your files for them (like depositfiles does), neither the wont remove payperdownload money from delete files (like rapidgator does).
but almost the most important: ryushare has the best ftp upload speed ever seen in filehosting history. they dont limit it. so go for it if you are heavy uploader with automated tools (powerfiler + blend mp = win)
on the other side, as u highlighted, ryushare is not that nice as too many uploaders use it, so it means more competition for bills.
some heavy uploaders aprreciate new filehosters and have made habit to change filehosters constantly because it means fresh new bills (less competition).
on all hosters, only ryushare has my faith.
if u want to make quick first opinion on a filehoster it's as easy as this: contact support. if no response: leave. if accurate response in decent time frame: u can start giving it a try.