Thomas doesn't seem to pop up enough on the forum, despite it's still immense popularity. Going into a little nostalgia myself (I'm a 90's kid), Thomas was a huge impact in my love of trains today. Despite it not being quite as charming as it was back then, it still gets today's youth into trains, which is always a good thing.
Overall, I'd love to see Lionel do Edward for the Thomas lineup, since he was my favorite character personally. He was the kind and experienced type who always gave good advice despite being older and not as strong as the other characters, especially in the older series. He just made a great role model.
So, for those who grew up with Thomas, or simply still find interest in it today, who was your favorite character?