Definitely just a hobby for me... and a great way to spend the day on the internet at work in terms of my involvement with the culture of it.
The attachment to a reptile is very different from that of a dog. That's the biggest difference you're going to find.
And the cost... which ties in with impulsivity.
I had a German Shephard growing up that was from a top quality show pair. It cost 1600 dollars and lived for over 12 years. Some people will spend that in a weekend on 1 snake to add to their collection of 20+. That snake will spend 90% of its time out of sight of the owner and not sharing affection or providing companionship. It's simply a different type of hobby.
Not particularly comparable is my final judgement.