This could be a tough one for some! I think my favourite manufacturer has to be Wismec, I just love the style of products they come out with, especially some of their mech mods like the Noisy Cricket and the RX Machina!
Which manufacturer gets your vaping vote?
I think my vote goes to Geekvape for their innovation and consistency
Wow! Ya, sorry, that is impossible for me. So many shine in different areas. I don’t even have a favorite mod. I love variety.
That is a tough one to limit to just one. If you go by how long I’ve used specific gear, it would go to Pioneer4u.
Thanks for the replies so far 
its hard to choose just one isn’t it? I think I could stick by my choice but that doesn’t mean that I wouldn’t find it difficult when something new and shiny came out!
Personally, hands down, Smoant.
Consistent delivery of regulated power.
TC is excellent.
Accurate coil measurement.
That’s hard for me too, Smoant is indeed very good but there are others that are as good.
I can tell you my least favourite… SMOK 
I can tell you my least favourite…WISMEC and their wonky 510’s! (On regulated mods anyway) But hey! That’s not this thread.