[Agreed]

I use different ones for different purposes.

For quick guitar track reverb, KarmaFX Reverb is great. Very low CPU hit, practically no latency, so it's great for tracking.

I have a bunch of IRs that I use, too, but does it matter which IR loader I load them into?

I use Bootsy's Epicverb sometimes when I want its particular flavor, definitely one of the best freeware plugins around. But then all of Bootsy's freebies are amazing. Seriously that guy ought to be charging... But I'm glad he doesn't.

Lately I have enjoyed Softube's Spring Reverb plugin, it has a much more nuanced range of sounds available than many spring simulations. Not every spring reverb unit made was splashy and gooey and huge sounding, it's nice to have the option of a more subtle spring treatment without having to turn the mix next to nothing.

I actually use Amplitube Fender with everything disabled except for the Fender '63 Reverb, because it just has this sound that you don't get anywhere else. They did a great job with that.

And I recently got IKMM CSR, which might make the rest of my non-spring reverbs obsolete. I've only had it for a short time but I am already finding it to be an extremely powerful, very nice sounding reverb that's still light on the CPU (more so than Bootsy's free Epicverb). I can get sounds out of this that remind me of pro recordings, so it's likely to become my go-to if I'm not after spring reverb. I love how the CSR Plate plugin sounds on guitar, really lovely... Hendrix used plate reverb on his tracks and I can get some very similar sounding reverb with CSR Plate.

I have heard good things about Breverb but I haven't tried it. I have also heard that it sounds awfully similar to CSR?