There's nothing strange about being drawn to medium format!
I've got a couple of Mamiya TLRs and 5 lenses,and I love using them-although I do still use my 35mm as well.
The larger neg gives a better resolution than 35mm-because a 645 neg is roughly 4 times the area of 35mm,smaller objects have much more definition.
Also,it requires less magnification to print an 8x10 from a 645 than 35mm,so grain is less noticeable.
And focusing a 35mm camera has to be ABSOLUTELY spot on-with 645(or in my case,6x6-Mamiya TLRs are square format)-you can be a LITTLE sloppier!
The only real disadvantage is the weight,but the results are worth it!