a few words:
the pure satisfaction when we get everything just right, even though we have spent endless hours and numerous headaches trying to get one thing right, only to have another wrong following the initial problem.
Seeing that look on a relative or friend or wife/girlfriend's face when they see that it is finally right, ***not knowing the cost***
>>>For example, just the other day my grandparents were in town for a visit. They had seen my tank about 4 months ago when the current scape had started. It has filled in and is starting to look much better (minus some problems, we all have those though, right?) He actually went out and got my G-ma and told her how good it looked. That night my G-pa asked if he could steal my room for the night because he wanted to watch it for longer. (fish included)
Also, I think everyone on here improves each other by giving quick advice, varying levels of expertize, and just over all attitude of you guys towards having aquariums. It's made entering to a world of plants so much more enjoyable and less stressful.
If we were truly worried about money, this would not be the hobby to start. (quickly found that out myself, planning and gathering materials for my first 75G.)
ps(have only just recently started planted aquariums. Experience: 6 months, and many more to come!