Well from what I've read I think there are a few on here who underestimate their abilities.
I've paid for help in years gone by at shops where one would expect the person working on your equipment to be an expert only to come to the realization that they knew less than me and I won't even go into how many times I've been raked over in an attempt to get an automobile repaired by "experts".
I can build a decent functioning box.
I can overclock them until they are stable.
I can eventually figure out pretty much any software I've need of.
What I encounter that stumps me I eventually figure out after doing a bit of reading and googling or with help form the likes of the kind folk around here so if expert means can I do anything computer related without making a mistake then no.
If however I compare my abilities with many who actually do this work for a living then I'd have to say for the most part I can hold my own so I'm just as much expert as some yet not as much as others.
Just wanted to add that what I've also noticed a number of times is that when I do end up facing some challenge that confounds me I post in a couple of places to get tips or help and more often than not those posts go unsolved suggesting to me that I'm about at par with many when it comes to skill level.