I've never considered myself addicted to cigars, but I truly enjoy smoking them. They're more like a Scooby Snack for me...and I treat myself to one or two a day just because I feel I deserve it.
Like you, it's all or nothing when I get into something...and it's always been that way since I was a kid. I can definitely relate to going crazy with hobbies, but I consider smoking cigars as more of a special treat than a hobby or addiction.
Now collecting cigars...that would probably be another thing. I guess I'm fortunate in the sense that I smoke what I buy within six months. I don't think I've ever been able to just let a box of cigars sit and rest for any longer than that. I have a lot of respect for those who have the patience and will-power to stash away for future use.