I agree with this too. I've been playing LoL a bunch with my buddies lately and although it's fun, none of the heroes have any depth to them at all.

In DG I'm constantly thinking about how I'm going to evolve my skill build with the current situation.

If DG had a bunch more items, that would even farther increase diversity.

Demigod may "offer" different skill sets but I typically use the same skill build over and over again.  At most I have two different builds for some of the DGs but I don't think I have 3 builds for any DG.  The only real choice I make is the favor item.  Outside that, most games are the same.

Do you not adapt? Instead of ooze get spit because your allies can't seem to get that final damage off to kill someone. It may not have 3 effective builds but at least you can adapt and even change your build slightly each time. I do that with every demigod don't tell me it isn't possible and that one build rules them all. There is no single best way to pick skills because each game is differant. I even as QoT find myself using a mixture of all her skills with no particular build in mind. I make it up as I go.

First, a DG may appear to have more depth than a HoN or LoL champion in terms of the skill tree, but as someone else noted, there are typically one or two DG builds that players gravitate towards.  So there really is very little difference.

As for adapting, that's where the wondrous diversity of items come into play.  LoL has items to negate stealth, deflect spells, cheat death, augment abilities, etc, etc, etc, which have a tremendous impact on gameplay, whereas DG items tend to follow a predictable sequence.

Play some more LoL and I think you'll find there's much more depth than you think when it comes to composing teams, selecting lane partners, upgrading skills, and buying items.