Yeah, the best part for me right now is the look on my soon to be 5 year old's face when she comes in the garage and sees how much of her desk is done so far. The bad part is that when we were looking at buying her a small wooden make-up desk around Christmas time and it was anywhere from $150-200, I thought...I can build something a lot nicer than that for that price. Soon it expands into an art desk end, electrical ran in it for power outlets, and the vanity light and so on. I couldn't even guess how much I have spent on it so far. The same was true when I planning out that vanity. The other bathroom that I had just done, I bought the vanity (about $1000 for it) and when redoing the half bath I though I can make one myself for pretty cheap (I was originally thing an open concept, floating shelves style). Then a couple sketches and redesigns later, now 3 drawers and 2 cabinet doors (all with the soft/auto closing feature), and a bunch of different tools, I can't even remember how much I ended up spending on it.
The reason for most seams in table tops is to reduce/limit wood movement. If you can hide that seam at the same time and produce the look of one board, you're ahead of the game. The size of the top is irrelevant! If you must use multiple boards, it's generally best to try and hide the seam. If you can't hide the seam, then turn it into a feature and do what you can with it. I your case, the seam is textbook to hide it!
Great job on those projects. Looks like your not giving yourself enough credit.
Woodworking definately can be addictive. When I'm deep down the rabbit hole on a project, it's about all I can think about. I also have the habit of going so hard so fast I burn out by the end of the project and don't want to build crap for a free weeks. All it takes to spin up again is the right idea, a unique piece of lumber or a honey do.
Expensive.. yeah. Just don't tell my wife.