Well, first of all know your limitations and stay within them unless taking a course that puts you into situations where you are learning.
I consider myself a reasonably competent recreational diver after 1800+ dives with technical training.
1- Diving in strong currents (if possible vertical in addition to horizontal and washing machines) and getting out of it. -
Sometimes you don't know until you're in the water. Being reasonably fit helps as well as being very familiar with your gear. Knowing beforehand what the conditions will be like is very helpful. Only once did I have to drop a weight belt in a down current, one of my few scary dives.
2- Drift diving and surfacing at the agreed place at the end (orientation). -
Knowing the site and good navigation are required as well as use of DSMB. Most drift dives that I've done had boat cover, not all boat "captains" are proficient at following bubbles.
3- Comfortably diving to 39 meters and mastering all the what if emergency situations. -
Again training is important, if I don't have the right gas for a 39m dive I wouldn't do it. If diving air then I'd be carrying a deco bottle but then that is no longer a recreational dive!
4- Shore entries with rough surf. -
Know your limitations. If it's too rough don't dive, you don't want the dive to turn into a rescue scenario. I've thumbed a few shore dives because of the weather conditions.
5- Water entry and exit when sea is rough.
Assuming this is from a boat, I've seen a guy lose the end of a finger whilst climbing a boat ladder that was banging against the hull of the dive boat in rough weather. Weather can change while you're down, but a decent boat operator should be checking that before you even load your gear on the boat.
6- Negative entries (I tried several times and got minor barotrauma. Until I can equalize faster, I will pass on that one).
I agree on that, I have good days when I can get to 30m in less than a minute and other days it can take me much longer.
7- Preparing gear and diving with two cylinders. -
At least get some training, it's not rocket science but you have to be aware of how to deal with valve drills and getting your trim sorted because of the additional weight of valves and an extra regulator.
Although I've done tech training and do tech and deco diving fairly regularly Rebreathers are not for me, I can't justify the cost for what I do and what I plan to do in the future (although I'd love to dive to see and photograph a coelacanth ).
The beauty of some caves I've seen in photos I'd also love to see some day. It will just require some additional training.
Night diving is awesome, you are allowed to bring a torch
Drysuit diving is also awesome, nice to be warm when in a wetsuit it would be cold and that's not limited to the colder waters of Europe or elsewhere. Many divers in the area I dive are now turning to using drysuits in the "winter" months, it's a matter of using the right gear for the elements and the exposure time. I frequently see wet suit clad divers shivering on the boat ride back to the marina after our second dive while those in drysuits remain comfortably warm.
Above all else, enjoy your dives.