Thanks for the thought, that's kind of you to ask! Any store is great, but just to be clear because this is so often talked about:
Steam is great for us. I know people talk about stuff like Steam taking 30%, but actually Steam takes a variable amount that goes down to 20% once the game sells very well (and this will reach that). Not to mention every purchase on Steam causes the game to get greater visibility within the Steam store, since it's algorithmic visibility based on sales, so when you buy on Steam you maybe are causing one other person to see the game and buy on Steam, resulting in even more sales. Honestly, even if the store cut stayed at 30% instead of going down to 20% like I mentioned above, Steam would be delivering far more than that in additional marketing/advertising it gives games for each sale. Moreover, Steam is an incredibly nice partner -- they actually make possible so many other stores by offering keys for free to developers to put on other stores, basically donating their server infrastructure for free to allow other stores to exist.