A nice coincidence - I've recently got into bath soaps myself, after overlooking them on the shave sites for the past 18 months.
I got the green Musgo Real soap for Christmas and the 3 pack of TOBS soaps - Sandalwood, Jermyn St and Eton College.
Musgo green smells amazing, somewhere in between Imperial Leather and Wright's coal tar and not too drying. It's an awkward brick shape and took a few showers to get it lathering well and into a useable smooth shape. Worth the effort though. The TOBS soaps - they lather better, dry the skin less and are smooth shaped so easier to use but the 200g bath soaps are massive. For at least a week I kept dropping it in the shower because you need big bear hands to handle it properly at first. I've tried all 3 that I have and all are the same quality with a strong scent.
My take on supermarket brands - IMO Dove soap is by far the best quality and best feeling on the skin, it just smells a bit femanine.
Best advice I can offer - try to stick to around 100g in size unless you have big hands to handle the 200g TOBS type bars. Have fun trying everything!
Next I'll be working my way through the Musgo scents then probably onto Truefitt & Trumpers.