Can't speak for everyone else, but there's a lot of reasons I like it. The presentation is probably one of the deciding factors. I always find the sort of art style/tone/content dissonance present in the DR games fascinating. Everything is so heavily stylized like pink blood, yet deaths are treated as the horrifying events they are, and for me that creates a really cool dichotomy that just works really well rather than being jarring.
Yes, the characters are very tropey, but it seems to me like them being caricatures is intentional so they can be broken down when placed in a terrifying situation not generally associated with said tropes. It makes some of the character arcs (not all, mind you) really well done IMO, something that's furthered if you get all their free time events, which makes all their actions consistent with what's being presented of their characters. It extends beyond the game as well, as it took some fanmade videos to make me realize just how tragic
story really is.
Then there's how fast-paced it is. Uchikoshi games (999,VLR) are VERY end-heavy, whereas DR gives you appealing over-the-top cases almost right from the beginning, with frequent moments of intrigue to further the overarching plot. And while I do like Phoenix Wright, DR just blows it out of the water for me on presentation alone, which is enough to make the numerous mini-games tolerable or even fun.
And of course it has an absolutely killer soundtrack.
I will say DR2 does give a lot more information on the
and it also has an amazing twist, but this is clearly not the series for you. Ah well, not going to appeal to everybody.