I have stayed solo at ASMo, POFQ, BWI, BWV, OKW, YC, BC, WL, VWL, Swan. Also non-solos at Poly, CBR, and AKL.
I prefer the deluxe resorts in the Epcot area for location and interior corridors. I like being so close to Epcot and MGM, the dining choices, and I feel safer. But, each resort has its charms, and I have never felt "unsafe". In terms of service, I have found the BC staff to be the best--attentive and friendly.
I usually stay at BWV because I'm a DVC member, can work out for free, and it feels the most like home.
My goal is to stay at each on-site hotel at least once. They keep building new hotels, so I'm not sure I'll ever reach that goal!