I open with both hands. Hand one isn't especially beatyful but it contains enough spade points. so 1♦. Hand number two has a suit that I want to be leaded, so 1♦. If I were not vul and opps vul, I would probably open 1♠ :)
I think that I should consider that I play matchpoints. Leading low diamond leads very often to losing a diamond trick on W and that leads to bad score. So in my opinion the best choice is ♦K. Of course if I play imps, I would choose low diamond because it gives more chances to defeat the contract.
spade lead - I need from partner D or Ai heart lead - I need form partner A, K or 10 club lead - I need form partner K, D or 10 So I have to make a choice between hearts and clubs. I choose club because of the highest possible benefits.