Megaupload was once the favorite place for uploaders to host their files, mostly for Asian dramas (fansubbing) because they offer a good balance between speedy and comfort. Even free users can get the files without any long delays and the speed is adequate for normal download.
After it has been taken down on January, most of the uploader tried to find the best alternative for Megaupload and some of them picked RapidShare and MediaFire. I once used RapidShare and it's really great, except for free users limitation which is way too long i guess (6 minutes of waiting time). MediaFire is better because you only have to wait for 5 seconds and you can have multiple download at the same time, something you will never have with RapidShare with free user capabilities.