Which gaming brand has the most loyal fanbase (Sony, Nintendo and Microsoft)?

[PigSaint]

SEGA.

Old SEGA, I mean. The SEGA of MegaDrive, Saturn and Dreamcast. The SEGA of innovation and creation. This company doesn't exist nowadays.

I think Nintendo is the company with more loyal fanbase. Maybe not in Europe (probably Sony wins here), but they release the same IPs since the 80's and people is still buying their products. I think they don't deserve it.