on the other hand being unable to erase makes thinsg easier. line is wrong? no worries, yiou can't correct it, anyway. instead you look for a way to work around it. :)

ball pen sketching is fun!

nice TF sequence, btw. :)

Great study! <3

I really like the detail put into this :D

Very nice. I miss doing studies like this.

Neat, TF's are my favourite. I'd love to see someone's ears turning into big fennec ones! :3

So coooooool. Thanks!

My friend Tom, the animator says sketching in ballpoint enforces discipline.

Nice ear variations :)

Wow very cool

That's some awesome transitions!

This is great!

Looks nice. Also inspiring explanation for sketching with ballpoint pen, can relate to what you said.

The one on the right reminds me of Clare (from the anime/manga Claymore) when she half-transforms while fighting the silver-eyed Lion King Rigardo :)
Love the expression!

I'm certain you know y now BIC makes... Or used to make an erasable ballpoint.

Anyhoo, I am really intrigued by the expression of the Lycanthrope in the lower, right corner. I have drawn several transmorphical characters which retain their human personalities and interests while in animal form. Some can be quite dangerous too, because they can do everything from turn doorknobs, call elevators, drive vehicles and type on keyboards while fully in their animal form. (But I have to keep the fox and feline types away from the computer mice.)