I enjoy VOCALOID 3 as a software vocal-synthesizer very much. The .wav import tool is handy in case you're not sure if everything is on time or on pitch, and general quality seems better to me. (Please note I'm going off of V3 banks only, not V2 -> V3.)
The velocity parameter works now.
And did I hear "hidden phonemes" for some of the banks?
Also the drag-and-drop sounds for some of the banks are good too. I'm aware Oliver still uses the br# system though.
I'm not sure if this is on-topic in any form, but not only Mew and Tone Rion have unique voices. IA has mature female voice, Aoki Lapis has a voice I personally think is charming compared to most of the other less-mature voices in the female department, and when VY2v3 comes around, oh look, an almost normal sounding male voice has appeared that I can actually refrain from calling Soprano or Bass/Baritone. (Which is partially contradictory to my earlier statement about going off of V3 banks only, however VY2v3 and VY1v3 are entirely re-recorded for the VOCALOID 3 engine, compared to the V2->V3 banks which make new samples out of already existing samples.) Bruno has a similar voice-type that I can call young-male without being too young like the following, kind of in the 18-26 range, and Oliver has a timbre that is commonly unseen in the younger male-voices off VOCALOID in general, as he was actually voiced by a similarly-aged boy. Check that out- they found a good people to record, that's for sure. And if anything, all of the V3 banks I've noticed have had more VOCALOID type traditions in mind- a lot of collaboration between artists, not even before release, especially for IA. Lia, 1st Place, various producers, various artists, even an MMD model was made before release (a very EXCELLENT MMD model, may I add), all working to make a VOCALOID known. I'll be honest- I didn't like the marketing scheme as much as usual, though it definitely shows that companies are actually paying attention to fans for inspiration, and that's what I think counts. Vocalo Labs / whatever its called, the company that made Bruno and Clara, you know who I mean, they held a contest and used the winning art as the box-art, which was, too me, shocking! No other Vocaloid company had done it before, save Sonika, who had something like it in the form of three short comics instead. (Big-Al's boxart was created by the same person, if I recall, but I don't remember if they were hired as a graphic designer or something or not, or just commissioned.) SeeU, too- a whole lot of producers and artists, working together (with whatever the company is) to promote a VOCALOID, and I have to say, they did very well- SeeU is near the top of the list of VOCALOIDs I should get (though I probably will fail at using her simply because it requires hangul input, if I recall correctly).
There is A LOT for me to talk about. But I personally think that Vocaloid 3 is making things quite for accessible for everyone.