For me, my list goes as follows. I've only managed to ride 3 inverts as I live in the UK.
1. Nemesis - Nemesis is located in my "home park" so I get to ride quite frequently. Despite it's roughness, the sheer intensity of Nemesis remains unmatched for me, the only ride that's come close is Tatsu. Also, Nemesis is very well laid out in terms of off-ride, sometimes I just take a minute and watch the trains racing around the track.
2. Nemesis Inferno - I honestly believe this coaster is very under-rated! Whilst not as relentless as Nemesis, Nemesis Inferno does pull some good Gs. It's also quite a bit smoother than the original, but I can stand a bit of roughness so I don't mind too much. The final helix is surprisingly intense in my opinion.
3. Batman the Ride (SFGAm) - It's a perfectly good coaster, but it doesn't really have the showmanship Nemesis displays or it's relentlessness. I rate Ninferno above Batman the Ride as Nemesis Inferno is just a bit more intense (again, I might have just had good rides on Ninferno and a bad ride on Batman). I remember it being a bit smoother than Nemesis though.