Mmm, I wouldn't say like Ace Attorney automatically makes you likely to enjoy Danganronpa, it's more a case of AA being the gateway into VNs with Danganronpa being the next step on the road alongside 999. Basically to enjoy Danganronpa you're going to need to like mysteries, at least tolerate anime and wacky plots, and be the sort of person that gets invested into characters, but doesn't get put off by some mediocre minigames every now and then.
Personally, while the Steam sale is on I'd give the first one a shot (just keep an eye on the clock so you can refund) and see if it grabs you. If it doesn't then try out 999 on the DS, that is a lot more of a straight VN but generally a lot easier to get into because it isn't as up front about the anime. And yes, it should be the DS version, not any of the other non-dual screen equipped ports. I know that may seem silly but trust me, there is a really strong reason why that nobody can talk about.