WHY!? WHY WOULD YOU START THIS HERE!?!?!?!
No matter if it's a bike site or car site or 4x4 site or scrapbooking site (not really) people get real opinionated about their welders.
I use a wire feed gasless welder. If anyone calls their gasless wire feed a MIG, they are incorrect.
Is this the best welder for bikes... no, but it's cheap and it's all I've got and I'm going to make the best of it. My welds are ugly and it spatters like crazy (flux core wire does this) but my welds are solid and I trust them.
TIG is awesome and expensive (expensive and cheap are relative terms, but according to my wallet it is expensive), but it makes pretty welds, however, the high heat can warp stuff.
MIG is great, not as price as TIG, cleaner than my wire feed, not as clean as TIG.
Stick welder... just use what you got.
We have brazers on this site that swear by brazing.
We will never EVER EVER agree here.
Will I ever upgrade from my wirefeed? Probably not, it's small, quick and easy, wire is cheap, plug it in anywhere and it does what I need it to do... make/modify bikes.