I also fell in love with the yorkie breed because of their beautiful looks and their size.  And of course their personality just won me over!  But I wouldn't own one that weighed 50 lbs.  My first two were standards (6-7 lbs), and I used to wish they were bigger because I felt they were fragile and worried they'd get injured or stepped on.  My two now are 8 and 12lbs, and I think that's about perfect.  They're still small, but not too fragile.  As much as I adore the breed,  I think over 25 lbs would be too big.  
