When I'd first seen its artwork (which was before playing Pokémon Black and White), I've sort of thought it to be some legendary, yes. Though, my thoughts on it had changed immediately as soon as I've seen its pre-evolution form, haha. This necessarily isn't a bad thing, however, as it did not alter my fondness or anything of the like; it was still one of my most favorite Unovian Pokémon out there.
In terms of design, Volcarona looks spectacular. It were up to them to create some bug-fire Pokémon, and what better way is there for them to make such a thing than this? When it comes to battling, it's also very easy to utilize all-around; after one use of Quiver Dance, it would be ready to sweep your opponent immediately.