My point was just that if you are in management or sales, it seems that having expensive clothing and an expensive car are part of that 'being useful' - Appearance is a huge part of those jobs that are primarily human interaction. Appearance is a hugely important when dealing with other humans. I mean, I'm not saying that social skills and appearance don't matter for the technical individual contributor; they do, but it is not everything (like it is for management and sales.) It is possible to be technically good enough that people are willing to employ you in spite of your poor social skills. Obviously, that isn't the case for sales and management (as those jobs are, in a very real sense, social skills in and of themselves.)
Also note: If you are dealing directly with VC, you are more sales/management than an individual contributor.
Also, might want to work with that resentment problem of yours.
If you're talking about dressing cleanly, not betraying only passing acquaintance with showers by one's smell and being able to appear in public without shocking small children into tears - yes, sure. But that costs next to no money. Beyond that - nobody could care less which car you're driving and which house you're living in, unless you're a bank president or some other C level executive or business owner, where your conspicuous consumption skills may imply the success of your business. If you, however, are a professional, there's no problem with living simply, should you wish so, if that doesn't imply looking like a dervish or living literally in a cave.
You are not perceived as eccentric geniuses, not by anyone. Never, ever. They might say that to keep you on the treadmill but the the truth is that (especially by VCs) you are perceived as cannon fodder with a personal hygiene problem. You are kept around as long as you are useful and don't bitch too much. The minute that stops you are out on your ear. Welcome to the real world.