I like what Brick pointed out. It all depends on what YOU want out of this pursuit. If you’re just staying in shape, and the 3x/week works for you, thats great. It’s probably easier to be motivated when you don’t have to get there 6-7 times each week after work or school. Of course, if you’re serious about seeing “just how far” you can go, possibly even competing, well, that motivation better be stoked, because it’s a long road, and you won’t get there with the same training approach as a weekend warrior would make use of.
When I used to feel like not going to train, maybe after an especially rough day at work, I would sit on my couch for a little bit, and always eventusally come to the realization that this was the day where what I ultimately did might be the deciding factor when it came down to me and another competitor for the top spot. Now I don’t mean to say that sometimes a day off isn’t the smarter choice, but I would always tell myself when I was dragging ass, spacing out between sets, and even on rare ocassions being on the verge of tears as my body let me know it wasn’t happy, that these were the moments that truly make champions.
Just my 2 cents