These are made for X86, so I’m not sure they technically count as “old games”, but I’ve had a blast with recompiled+ported versions of TLoZ:OoT and Perfect Dark.
Ship Of Harkinian in particular adds so many features and improvements, that I’m not sure I would enjoy the original OoT played on an actual N64.
They may still hold up when emulated, though…
I’m going to be honest, that’s the one improvement I’ve never used - the original pseudo tank controls are fine to me, at least on a X360 controller