If you want to add a little ‘dust’ to your reverb chains, try a bitcrusher after your reverb. Setting this at 12-bit with a sprinkling of downsampling can take the ‘pristine’ edge off modern plugin reverbs.
Looking to add a gentle pitch wobble to long reverbs but don’t have a plugin which offers pitch modulation? Bounce your reverb as a ‘wet only’ audio file and load it into your sampler.
Tone-wise, vintage reverbs are often less transparent and pristine than their modern digital equivalents. If your chosen plugin doesn’t feature its own EQ, use a plugin after the reverb to contour bass and treble. Also, try other plugins such as saturators and tape emulators to further colour your reverb returns.