I also enjoy it as a hobby- if money comes along the way that would be great, but I don't consider myself good enough yet to make any kind of business out of it yet.
I have to admit, sometimes I think I'm in it for the wrong reason- I LOVE buying and selling gear! I suppose when it comes down to buying L lenses that may come to an end, as I've just moved from mid-range lenses to "good" lenses so there's only one more step to the top.
Frankly I'm getting bored of nature/animal pictures, when I get a chance to shoot people I just love it. Problem is I'm kind of a shy person, so I'm scared people might get annoyed at me taking their picture. But Iv'e got a wedding coming up, and super excited about that!
I think my interest in landscape photography might be greater if I had an ultra wide lens, but I don't want to buy another lens and end up not using it. I know with my current zooms I use them alot.