Aside from his concept art being overwhelmingly adorable I believe that Oliver has a great voice for an English vocaloid- the best I dare to say. I think that songs featuring Oliver could become broadly accepted and popular! It might be tough manipulating his voice bank to mesh well with a pop-esque song but I think someone really talented could step up to the plate with Oliver and hit more than a few home runs!
Some people might not know who Oliver is because he's less than a year old so I'll post some of my favorite songs featuring him!
I'll quit singing - link
Where's my love? -link
Mad Word cover - link
So what do you guys think? :D