The first gun I bought was a .22 rifle with the intention of mainly being a rifle shooter and only owning one or two handguns. I now have several rifles (3 are .22lr) but, other than the .22s, I don't shoot them much, especially this time of year. The indoor ranges only allow pistol caliber rifles and during the winter I don't get to the outdoor ranges much. Even if it isn't too cold, when the range closes an hour before sunset and sunset is at 5 or even 4:30 it is hard to find time to shoot. So the only rifles I can shoot regularly are my .22s and, frankly, they can be a little boring, especially at a max of 25 yards. I may get a M1 Carbine and .357 mag or .44 mag lever gun so I have more to shoot and more interesting things to shoot at the indoor ranges.
I have a blackpowder revolver that I love. Unfortunately, there is only one local range where I can really shoot it. All but the one indoor range do not allow blackpowder. The local public outdoor ranges (in addition to the problems above) only have a couple blackpowder lanes, and they are rifle ranges (don't think my revolver would do very well). That indoor range I only go to alone. It is hard to get my buddies to go 45min-1hr away to go shooting when there is a range about 15-20min away and they have no interest in blackpowder. Even when it is just me, I'm more likely to go to the closer range and not get to shoot this. So this one isn't shot often.
I had a shotgun that I loved. I do intend to replace it but, again, there is the problem of where to shoot (it was/will be a shorter barreled home defense gun, not a trap/skeet gun). The outdoor ranges only allowed me to shoot slugs, but if I want to shoot a rifle I'll shoot a rifle. Plus, slugs don't do me much good for practice when it is a home defense gun. Only one local indoor range allows the use of a shotgun. It is the same range that allows blackpowder, so again, the same problems. Also, they only allow lead 00 buckshot. Unfortunately, that seems to be the least common shotgun loading around here.
So, while I enjoy them all, handguns win by default. Whichever range I go to allows them (all local ranges I know of allow magnum ammo, unlike some I've read about) so they get the most use. Luckily, I really like my handguns. In fact, they've become my favorite guns, though that is likely because they are the ones I get the most experience with.