Anonymity especially is a big attraction as privacy is a big concern with any transaction. The problem with anonimity though is that it allows for a lot of illegal things. I guess you could say it's both what I like best and least about bitcoin at the same time.
If you are looking for anonymity then bitcoin is not the coin you must be looking for,even if you are a alt coins trader,we need to provide all the identities to verify the account for bigger transactions and so the anonymity part ends there,what i like is the volatility as it will help in trading and can make bigger profits than conventional trading.