I keep considering going back and finishing 3 and even giving 4 a try.
But then I remember I'd rather just play the original again, which is all you really need, even 2 was a downgrade although it was acceptable.
2 at least maintained the tone and style, 3 was too drab and dreary, they were clearly going for a Walking Dead style and while they seemed to want to return to the proper style and tone with 4 all they wound up doing was making an inferior version of the first game it seems.
Still, curiosity is a bitch and I can't help but be curious to experience them myself.
There are other games that impacted me more from a story and emotional level, but as for what I find the most fun to play the original Dead Rising is a good candidate for my all time favorite game, there's just something about it to where I can run around that mall and mess with the zombies for hours and it just never gets old to me.
And it was love at first sight too, from the very first moment I saw coverage of the game at E3 2005 I was obsessed with it, even in its earlier, rougher state I knew there was a world of potential in the premise and thankfully Capcom nailed it.
So my point is given what a massive fan I am of the original it's weird to think there exists two whole sequels I've never played to completion, so one day I may have to just bite the bullet and play them given that it isn't clear whether there will be another one and beggars can't be choosers.