Welcome! I am similar to you in that i kept hamsters when i was younger then moved over to the rattie scene, i had 14 rats at one point and went to shows, was great fun
. Since having my children though i didn't have so much space for more rats and after the last ones left for the bridge i hadn't had any other pets until deciding on getting another hamster recently.
Personally syrians are my favourite because of their size and they seem generally easier to handle than dwarfs but everyone has their favourites for different reasons!