This is a forum where at least the main part is for 8051 chips - so such a drop down box would then have to specify which of billions (yes, a slight exageration) of variants that is intended. But the truth is that one of the outcomes of the thread may be to figure out which chip to use. And hurtful as it might be - some threads may actually need the recommendation to go for a different architecture.

Same with language. Many people do things in C that they should do in assembler - or the reverse.

And drop-down boxes can't explain the knowledge levels. And the scale for your knowledge level would be highly affected by your knowledge - the more you know, the more you know that there is still to learn.

The only general rule/recommendation is to spend a lot of time on an initial post, to make sure that it presents the problem/idea/suggestion/... as well as possible. Especially since it isn't uncommon that people sometimes reacts to the initial post without reading all the already existing follow-up posts. However, writing a good initial post isn't easy. Just as with everything else, it's a skill where "practice makes perfect". It's hard to know what to include for the simple reason that it is hard to know what the readers will expect or their mood or their experience level. So it is hard to write the initial post for exactly the same reason that it is hard to respond to someones question. The responders don't know the original posters expectations, experience, mood, ...