Arr, the old age/gender/species tags just sound like something you might see in an Omegle chatroom. (xD)
I personally don't care for them, with exception of a few instances. That is, if you have an unusual species (not a lion/wolf/cheetah/leopard/jaguar), then I could understand why you might want to add the species to their nametag, so there's no confusion when you first join a roleplay with someone. I generally don't do that, but I have before. It's understandable.
The other exception is if you're in a distinct group/roleplay. Like TECs, for example, or my old wolf Rp, Divided Skies. There were two packs, and so we would put CM (for Crystal Moon) or ES (for Ebony Sun) at the end of names. And, if your wolf had a special rank, you could add another letter to it that represents that position. Since my character, Allegra, was the Alpha female of Ebony Sun, her entire name was "Allegra AFES."
It sometimes does get in the way of the character name, but a clearly-shown position in a roleplay can sometimes be helpful. It's a distinguishing characteristic for those who haven't had the time to read into another's bio, in particular.
As for adding the age, gender and species to a large canine that is quite distinctly a wolf, I just don't think it's all that needed. -shrug- Not that I'm hating on it, of course, but it just seems to be a lot tidier to have just your character name, and to learn about them through good old roleplay. ^^