Vienna Suite gradually became my go to plugs palette and it currently comprises about 90% of my mixes in all genres.
I think people reach for the compressor all too often and overlook the limiter. Personally I reach for the limiter first unless I want to texture the signal the way a compressor does. But if I just want to make something louder in the mix I go for the limiter.
What's the big deal with parallel compression? I only use parrallel, or New York compression, on drum tracks. Maybe others skin their cat differently than I do but basically mix drums down to one track, copy the track, then insert the compressor to that copied track, set the parameters of the compressor (I use a Vienna preset for Drum Room I think), then mix with the original drum track to desired effect. Isn't that pretty much it? I don't understand why you would want a feature for parrallel compression when all you're doing is copying a track and adding a compressor to it then mixing it with the original track. So would this feature do all that for you?
Incidentily, it should be reffered to as parrallel processing because you could do the same with other plug ins too like a reverbed timpani track mixed with a dry track for example.
Along with the limiter I think the exciter is also overlooked. I use it for pianos, choirs and even the kick on a drum kit. It works wonders in subtle ways. A very nice plug in.