I really enjoyed Tamers, but felt the first half was much stronger than the second.
Really? I found the second half much more powerful and moving. Although I guess if you're looking for something more fun and lighthearted, it could be off-putting. But it was basically an allegory for coping with depression, and that's something I can relate to personally.
I watched all of Frontier, but either they were aiming too young or I had just grown out of the franchise.
I was 31 when the first series debuted in the US, so I'd "grown out" of its target demographic long before. Still, I found that
Digimon Adventures had enough smarts, character depth, and humor to engage me despite being aimed at kids. And
Tamers, of course, skewed older and had a lot of smart ideas and rich characterization to appeal to an adult.
Frontiers, though, skewed much younger. It's interesting how that parallels their treatment of the Digital World vs. the real world.
Adventures was split about half and half between the two, particularly in season 2 when they were regularly commuting.
Tamers took place mostly in the real world with an extended middle part in the Digital World. But
Frontier was almost entirely in the DW, and despite its name, it was treated less like a virtual reality in cyberspace and more like a standard portal-fantasy-style magical realm.
But Digimon Adventure Tri has been a delight so far (albeit with its own forgivable problems).
I've never even heard of that one.