I've got three and I've been trying to grow each from seed:

1. Dawn Redwood because it has an incredible backstory, it is a true redwood contrary to popular belief, and It easily grows where I'm at.
2. Giant Sequoia because they are massive, it is also a true redwood, and it can allegedly grow where I'm at.
3. Cedar of Lebanon because I grew up in one of the many U.S. towns of Lebanon named for the trees as referenced in that religious book and I remember the original Cedar of Lebanon referenced in that story I linked.

Unfortunately, I can't get the Giant Sequoias past a few inches tall while even acknowledging their infamous 20% germination rate. The Cedar of Lebanon seeds I can't even get to germinate but I also haven't found as much academic literature on cultivating them from seeds.

Shoutout to the Ginkgo Biloba for being one of the OG trees, also.