Great game, loads of fun. The RNG factor makes it really engaging to keep going in to see if you can get a luckier run going, and to see how big the passengers can get (some sort of gallery mode in a future update where you can just look at all the sizes you've seen in runs, or just releasing the sprites, would be fantastic imo, this art is something else) and it's fun to try and squeeze as many people into a train as possible while maximizing your points.
That said, the Joggers and Dieticians feel like active detriments to come across. If a Jogger is fat enough, they can negate the bonus the Dieticians get from being next to them - and seemingly vice versa, despite the fact that the Jogger is noted not to dislike anything - which negates the entire point of having them. And given that character sizes seem to naturally increase the longer a run goes on, their use falls off INCREDIBLY fast, to an extent that it feels almost unintentional.