1. I have played this style for as long as I can remember: it is 'expert standard' (and not just for experts) in this part of the world.
I like it because it:
i) has preemptive value: finds major suit fits early if they exist
ii) gives better definition to the minor suit openings, allowing partner to compete after an overcall. While 1
♣ might still be on 3 (I need a decent suit for 1M on 4) the odds are far greater (than opposite a 1st or 2nd seat opener) that I have a real suit
My test is whether I will pass a semi-focring 1N response: if yes, then I open 1M
2. I play it every week
3. No: one partner of mine liked this style and used the sequence of 1M - 1N - 2m as 'to play', but I did not and do not like it.
4. 1NT semi-forcing: opener will pass 1N with a minimum hand with a 4 card major
2-way drury is very useful: it is possible (and desirable in a good partnership) to play a very detailed structure off of 2-way drury
5. I do not choose my method by considering what others, holding my cards, play. I choose my methods because they seem to be effective. If I thought that the methods played by others were better, I'd play them
'one of the great markers of the advance of human kindness is the howls you will hear from the Men of God' Johann Hari