I can't really say I 'prefer' traditional cameras, because I don't yet have a digital one!
For close-ups (most of the plant photos in IG) I use the thirty year old Canon SLR I inherited from my father, complete with telephoto lens. It's a bit clumsy, difficult to control, and depth of field is a nightmare - but you can uncouple everything and 'fiddle' so I am happy with it. I also have a Minolta Riva Zoom for slipping in the pocket while travelling, and I use it for the garden area photos. Very easy, but you can't fit on filters or lens hood - still nothing is perfect! One day I will treat myself to a digital.
I like to keep hard copies, so I still have the films printed. I put all the acceptable ones in indexed albums, and scan in the 'best' (or sometimes the only) photos for the IG records. I still have a long list of plants with no portraits to be photographed next summer.
My favourite plant - oh dear, what a question ? my long-term favourite for its colour, form, perfume and long flowering season must be the rose 'Joey' - I just love her. My newest passion is the genus Hemerocallis. I keep squashing in more and more ? and the excitement when the first bloom opens!