Definitely floppy, altho both mine have cropped..Samson's were cut too short, it looks like a Dobi cut and Angel's were done by the breeder...Hers are really nice altho one ear flops a bit, but she has such a pretty head that it looks allright. I just think that they have a lot more expression with the natural ears, but it is a personal preference..I DO NOT believe you should crop just to make your dog look mean or intimidating, esp a boxer, it's just soo wrong....
Mastray & Odinsdad have a very lengthy thread regarding this and how their Odin's ears came out, you might want to read it..