I have attempted thirty separate games. I am running into the issue that there isn't enough money in the game to keep the troops updated with the latest equipment and armor, to keep a minimum number of satellites in the air, and to fund all the research and foundry projects. In one game, I was shoehorned into assaulting the alien base when I didn't feel ready.
I think of returning back to Fallout 3, where I can set my own pace, or buying and playing Far Cry 3. I like games where I can develop at own pace. I feel that XCOM has its pace, and the player is attempting to play catch-up.