It's been a good few years since I watched this, but yeah. There are some pretty funny moments in there, but the general tone is still pretty dark. The short jokes ... hmm, like I say, been a few years, I don't think that they ever let up entirely, but I'm almost sure that they lessen. And about halfway through the series, things get much darker - but I won't spoil it for you! Tucker was definitely one of the darker characters, though, and his 'storyline' is probably one of the darkest in the series, definitely one of the most disturbing episodes for me, and I don't shake easily - probably has something to do with how horrific the transmutation was, and the fact that he did it to his 4-year-old daughter.
Edited by moderator: spoiler added (in the future, do so yourself).
Not sure if this all counts as a spoiler, but just in case:
But things will pick up in terms of pace. The series, I found, was quite episodic for a long time, but things were still tied together. The main issue, I think, was that they were adapting from an ongoing manga, which was why it veered off course like it did.
Which is the primary difference between the 2003 series and Brotherhood. Brotherhood is much closer to the manga. I still loved the '03 series, though.