RNG should have been how it's done. Now you've set yourself up for all manner of hate speech and complaints of favoritism. I actually expect a loss of a couple watchers, as well as the aforementioned hate speech, as a result of this.

Well, it's not like there aren't any chances of me doing more of these in the future... and if someone'd want art with my character that bad, they could always ask... at some times, I might even be inclined to pay the full price for an artwork, if I like the idea, though in this case, I've already mentioned that I might simply choose the character myself and not randomly...

Also, if anyone unwatches me just due to this, then I don't think I'd mourn their loss... and if I'd be doing this again in the future, I might simply give higher priority to those, that haven't been chosen previously, instead of the ones that've already had been chosen in previous events... which'll increase the chances of others in future events like this...

Ahhhh! i was kinda hoping you would pick that dragon~
so colourful :P