Oh yes, story is obviously a strong point on doing comic. But what I mean by "not appealing" is that look less interesting. Let say if I have to choose seeing those comic, I would definitely read the right one first because I know that is snake while maybe I will read the left next. But I will eagerly try to search your next upcoming snake comic but not that alien looking (although I know you mention they are the same person) because snake one is far more interesting as character a whole
Although try something different is good but sometimes you just need to stick simple stuff. Not just less interesting, I think right now that left one is looks complicated on the facial so it will hurt when doing expression and exaggeration. Those are also plays big part on doing comic. Still is up to you whether you want to change it or not but hope that clarify what I meant :)
Looks alright. Could use darker colors in general since its kinda hard to see the character colors as they look too close to white(could just be my shitty laptop screen but its not like I'm the only one using crappy screens).