Welcome to Newagemugen Forums.
Correct. There are many releases that are exclusive only to this forum.
Most content here is public and free for all members to download,
while there are also other more niche, high-end releases that are exclusive to donating/sponsor members.
Point and case there is something here for everyone regardless of your tastes/level of mugen fandom.
Regarding recommendations, obviously with Mugen being literally a 100% fully customizable engine that has content to suit all tastes, it is very difficult to make any recommendations.
We have releases here that cater for a wide audience, Marvel/DC/comic series fans, anime fans, retro fighting fans, Arcade game fans, and HD/OpenGL high end content fans.
Feel free to look around and see what is available.
Please enjoy your stay