My right hand technique is... weird?

[Suckbird]

Is it stupid to rest your right only on your thumb?
Cant really explain but when i want more speed and
accuracy then i move my hand from lying flat over the
pickup to "stand up".. it looks pretty stupid like i only
have 4fingers or something.

Is there anyone more who plays like this?

And is there any disadvantages?

[geoffkhan]

What you're describing sounds pretty normal to me...

[bos_mindwarp]

I usually rest my thumb on bridge pickup on Spector ns 2000

[Daniel Baskin]

My base position for regular playing is with my thumb resting on the side of the pick-up closest to the fretboard.

[SunShine]

Depends on what I want my bass to sound like, the closer to the neck I am the closer my palm stays to the strings. When I'm playing below my second soapbar my hand is pretty much floating.