Yes, 50mm f/1.8 is a good one for street and portrait. The bokeh is strong in f/1.8. I've try the Sigma 35mm f/1.4 ART, but the bokeh is smoother, not as strong as f/1.8, it feels like I like f/1.8 more ;D
Still saving some money to buy fullframes, so i can maximize the lens I have. Lol.
35 mm means you have to get quite close to the subject! I still feel to awkward for that :P Ye full frame would be nice