I like most of them, except some focus too much on the pr0n without any real story. Like oh heres some bullshit, hentai, more bullshit, hentai. And to be honest no hentai in eroges are even worth mentioning, its just saying that SOMETHING happened, instead of the 12 year old "lets flirt but never do anything" you see in shonen.
The stories in most are pretty good, but the games themselves are pretty bland. Its usually boggling down to "pick this option" in a story. The good ones like sengoku rance are pretty amazing though. I've also played a few were the actual GAMEPLAY was more fun than the entire plot/ero elements.(Very few of those tho).
Most type-moons are fun enough. I'd reccommend sengoku rance.