Terel
It is mostly what you can find, and what you use it for. I've done everything with my 19 that a 22angler or cruiser does. Mostly launch and fish alone (easily) but also take up to three grown men on fishing trips. It does get crowded fishing with more than two (there are only two side to a boat?). I Cross and recross to Vancouver island and Trail BC without any problems.
All that said...when I got my first motorcycle I immediately wanted a bigger one, when I got my first RV-same, and I'd love a bigger boat too...but it all comes down to what you can find, and there are more 22's than anything. They are all great boats.
Good luck.
Rob