I have been playing Dark Legends for a couple of weeks (Also downloaded Pocket Legends and Star Legends). So far this is my favorite game ever on my iPad.
Ally Missions - Although I never really cared for Mafia Wars or other such games on Facebook, I really like this feature here! I play very casually (job, sexy wife, and 4 year old son take a lot of my time.. not necessarily in that order.. lol) and this allows me to level at a decent rate even with limited playtime.
Theme/Tone - I love the Dark tone of this game. I like darker fantasy and horror and this game fits the bill. I only wish there could have been a werewolf or hunter faction to choose from as well. I am not too into the SciFi theme of Star Legends.
Graphics/Animations - I love the way the game looks. The character models and animations are awesome! I love how the vanity items and weapons look. I like how I can look how I want with vanities but still have good gear with weapons and gems. This area is the one thing that has kept me from enjoying Pocket Legends more. Although I do not mind cartoonish graphics, I have trouble getting into the way too cartoony animal characters/armor/vanities and the goofy animations of the characters.
Simplicity of Controls - I like only having 4 powers active on the UI. This keeps things simple. I play WoW and I really wish that game's abilities were more streamlined. You either need a gaggle of keybinds or have to click like 30 things in the UI.
Claustrophobic Feel - Everything feels so small. No exploration. Dungeon maps seem very short. I would like to see larger outdoor and multi-level indoor maps. I also would like to see some sort of minigames in the Vampire District.
Lack of Story -The basic theme is very cool, just wish there was more meat to it.
Repetitive - The mission environments are too repetitive. I would like to see more variation in the locations.
Boss Mechanics - While I certainly don't want anything like WoW bosses or expect something like that from a mobile game. It seems that either you just power through with elixers and bllod packs or when you actually have someone to run with on multiplayer it is a cake walk.
Trading/Auctions - I don't like that I can't sell or trade many things from my inventory. It seems any legendaries I have gained from Ally missions can't be sold or traded. I can't wait until vanities can be put up for auction. I also think I should be able to sell off/trade unwanted vanities that I have purchased for gold or platinum. I do however like the fact that items aren't 'soulbound' and can be sold or traded even if you have equiped them.