Same with mine! Except, my brother has the smaller tank. Which I bought for him. I bought everything for that betta. I couldn't stand him being in a tiny bowl. He has a 2.5g now.i notice a difference between my betta in my 10g w/ company and my sisters betta in the 1.5 hex w/o company.
the betta in the 10 goes everywhere, explores everything.. but he does like having his little plant area in there to swim through/chill in.
His betta is really old though, he's had him for like five years now even when he spent a good part of his years in a tiny bowl. Which is ironic because mine died of a tumor, mine who was in a 5g and then in a 10g.
Katie, that looks NICE. I think the tall ones are okay as long as you have tall plants reaching just below the water surface for resting. Mine is going into a tall 15 or 20g, I can't remember which it is. I have to go out and buy some tall plants.
Even being a breeder and having no space for larger tanks is still not having larger tanks which is cruel, IMHO. Until they go to their new homes, they still have to live in their tiny spaces.