I have three main personalities for Snakes. One is his role-play personality, a second is his time-travel series personality, and a third is his Yu-Gi-Oh! crossover personality. I didn't consciously let this happen, but somehow it did, partially because of the different events in the assorted verses.
I have Snakes as a main character in two role-play games. One is private, the other is publicly online. In both, he is quite a timid, insecure person. Both feature him as trying to turn his life around and feeling awkward and uncertain of himself because of that. The public one includes the scene where Count Manzeppi tries to force Snakes to join him under the threat of being poisoned again. Snakes cracks under the pressure, agrees to join him, and then falls to his knees and sobs. But when ordered to kill Jim and Arte as a sign of loyalty, he immediately tries to shoot Manzeppi instead.
I'm planning to have that scene in my Manzeppi story, and it may be even more poignant there than in the role-play, due to Snakes' personality in the time-travel stories.
In the time-travel series, following the point where he decides to try going straight, he is still cowardly and a bit awkward, but not really timid or insecure. He still fears death and bemoans going along to rescue the hostages in Airship, feeling that he wasn't able to really help them anyway and he only put himself in danger. Sometimes, such as when dealing with idiots like Sheriff Cord and knowing he has a trump card, he comes across as smooth and bold, as he did during the old days before his death.
In the Yu-Gi-Oh! crossover stories, particularly the long multi-chapter Close Your Eyes, Clear Your Heart, Snakes is similar to his portrayal in Airship, only much more cynical. It's as though yes, he's trying to go straight, but he's still alone; Coley, Ray, and Lafe are not close enough to him for him to consider them his friends, at least not yet. The problem with this is that Close Your Eyes must take place after Airship, since Snakes is acquainted with the pilot that he met for the first time in Airship. That was my error; I had really intended for Close Your Eyes to take place before Airship, which would make more sense. I just forgot about when Snakes met that pilot.
I theorize that even though the time reset was only supposed to change the events leading up to Duke's friend's death, perhaps something went wrong and it changed a few other things as well, leaving Snakes alone and cynical. Or perhaps, the cynicism was subconscious, a product of his frustrations over what Duke was doing and how Snakes was sure it would go badly for him in the end. But time and memories are set right in the end, so Snakes would have all the friendships he had before, even if for a while he lost them (and I'm not sure he did).
Snakes is also more cynical in the Yu-Gi-Oh! stories because, I think, he feels he has to be the responsible adult in those adventures. He's trying to help someone who is still a teenager. In the role-play verses, where he is more timid and insecure, he is a follower, trying to find his place among people who are older, wiser, and more experienced with friendship than he is.
The time-travel series puts him somewhere in the middle of all that. But as to which version I usually think of when I'm working on the website or other things, that is a good question. It can vary depending on what verse I've been playing in lately.