TLR's are a weakness of mine. I've got a Rolleiflex 2.8C, Rolleicord Vb, 1 Yashica LM, 1 Yashica EM and a Yaschica D. I did have a couple of Autocords but sold them. There's something about using a TLR that feels right for me.
My favourite is the Vb because of its weight and surprisingly sharp lens.
Like you I had a medium format SLR (500 c/m) but sold it as it got very little use.
As stated previously they are a great conversation starter, usually "Hey my dad had one like that". Great cameras.