Personally not a fan of a couple of things which I shall elaborate on each below;
Speedsofting - I enjoy a semi-realistic type game, I appreciate not everyone has the skills or desire to play Milsim - this is completely fine and alot of the Skirmishes I go to have realistic objectives, realistic site designs ect and people come to 'roleplay / re-enact' military operations ect but what annoys me is when you get a group of people with their HPA pistols darting about, sliding all over the place not playing the objective and simply 'killing' people in a crappy fashion. Getting 5 kills before you die is all good but you're not helping your team push onto a site or collect an objective. Do not get me started on speedsofters who seem to think powerplaying is acceptable..
Leads me onto my next gripe and this will be a controversial one, HPA. I am in no way a HPA fan, I despise it. I am sure that somewhere in the world there are sensible HPA users but I'm yet to meet one. A few weeks back I was playing at a site in the North West. It has a long back corridor, probably about 45-50 meters in length, at either end is a double door type set up to provide cover. I engaged a target at the very far end, I clearly hit him multiple times in the helmet (all that was showing, I don't purposely aim for the head area unless that's all that's visible. I try to avoid shooting peoples expensive weapons!) The person flinched a fair few times after being peppered in the helmet a few times, only for them to pop around the corner and pepper me back (fair enough, they didn't take the hit but that wasn't the problem, neither was the returning fire in anger) what really got me was the fact a round hit me in the finger. I wear Mechanix armoured gloves, nylon fabric on the fingers with polymere armour on the knuckle areas. The BB pierced the polymer and broke my finger instantly. Now I have no proof of course, but I've been using those gloves for about 2 years and they've taken multiple hits from closer ranges and never had an issue. My best bet is this guy was using heavier weight BBs with his power turned up way beyond site limits but of course when the chrono comes out, its turned back down again.
In my opinion, if a site cannot regulate HPA strictly it should not be allowed. There's no need for a ROF in the high 60s nor is there a need to deliver a .28BB are bone smashing speed. It's just silly.
Having said that I am sure there are sensible HPA users, I'm just yet to meet one.