There was another thread on this the other day, and it was framed differently I think or maybe it wasn't. My stance is that I enjoy the shows, I prefer AVN because I love Las Vegas to begin with, but it's a good vibe and with the proximity to L.A. and how many performers are out that way, I find it gets a lot more traction from an appearance standpoint than an Exxxotica (I've only been to the one in New Jersey so only speaking from experience). That's not to say that there won't be people at Exxxotica, AVN is just my preference when I compare my experiences to the two.
I just find the conventions fun, and someone I spoke to recently summed it up perfectly, it's like Porn's comic-con. If meeting your favourite stars isn't what you consider fun, and you don't want to deal with other people in that environment because it can get packed and crowded, then maybe it's a no go for you or someone that's stuck deciding. For me it is fun because I get to meet and chat with my favourites, especially if they don't provide, and I always discover new faces, whether it's in porn, or webcam, or something like that.
It's honestly to each their own but I love it.