For f2f and press games, I don't have any standard openings - I'm always going to choose something after talking to everyone, and I don't like to limit choices before that talking happens.
My favourite-ish Gunboat openings (these are by no means the openings I always use, I like to vary it up because getting stuck with the same openings is a recipe for getting complacent):
England1: Edi-Nwg, Lon-Nth, Lvp-Edi. (Yeah, Edi, not Yor. Opens the possibility of convoy via Nwg instead of Nth, freeing Nth to do something else. Yes, if French ->EngC then it's all a bit ugly, but not necessarily game endingly so.)
England2: Lon-EngC, Edi-Nth, Lvp-Wal (Let's just declare war on France - bit crazy, good odds of getting zero builds, but if you really wanna go for it... and actually it does keep your options a bit more open than it may seem. Landing an Army in Belgium without support can sometimes happen, depending on German and French openings, and from there you don't *have* to attack France, even though they'll be expecting you will...)
France1: Mar-Spa, Bre-MAO, Par-Bur (expecting Mun-Bur, but at risk of slightly sabotaging potential German cooperation)
France2: Mar-Bur, Bre-MAO, Par-Bur (the "let's take Iberia and be happy and hedge our bets" option).
France3: Mar-Bur, Par-Pic, Bre-MAO (the "Reverse Schlieffen Plan" - very dodgy, likely to result in one build in 1901 - not necessarily a fatal problem, provided someone else comes on board v. Germany by 1902).
German1: Kie-Den, Ber-Kie, Mun-Ruh (or Bur, depending on how paranoid you're feeling). This buys into the whole F1901M Problem Of Sweden. :-)
German2: Kie-Hol, Ber-Kie, Mun-Ruh (or Bur if you just want to declare war on France). Avoids the Sweden Problem, but then, that isn't necessarily a good thing.
Russia1: StP-GoB, Mos-StP, Sev-Rum, War-Ukr ("I want my two builds and hedge my bets North vs South"). Austrian Vie-Gal, Bud-Rum would make a terrible mess here, but that's a very unlikely opening from Austria, since it makes it very likely Austria will get zero builds. Also a bit anti-English, but not definitively so. A fairly clear "Please R/T" to turkey though. Might not help, Turkish Fleet Bla is very likely. :-)
Russia2: Sev-Bla, Mos-Ukr, War-Gal, StP-GoB. ("Let's mostly declare war on Austria").
Russia3: Sev-Bla, Mos-Ukr, War H, StP-GoB. ("Let's hedge our bets and see what happens by 1902")
Austria1: Vie-Tri, Bud-Ser, Tri-Alb. ("Greece is mine.") War-Gal makes this opening very bad though, but it's very nice if that isn't the Russian opening. High risk, high reward.
Austria2: Bud-Ser, Vie-Gal, Tri-Alb ("Let's grab Greece whilst poking the bear.") Ignores any potential for trigger happy Italians, but ah well.
Austria3: Bud-Ser, Vie-Bud, Tri-Alb ("Grab Greece, and leave myself open on both sides, which is the Austrian version of hedging your bets with an opening").
Austria4: Vie H, Bud-Ser, Tri S Ven ("Let's just take the one build, and wait to be attacked")... I'm not sure I would actually play this opening, but it's the paranoid tactical option. You definitely get one SC and can't lose any. But then 1902 is likely to see you jumped from all sides, IMO.
Turkey1: Ank-Bla, Con-Bul, Smy-Con. Probably the most standard "play it safe" opening?
Turkey2: Ank-Con, Con-Bul, Smy-Ank. "Let's R/T". Cover yourself in fall with Bul-Con, Ank-Con, Con-Aeg. You *could* theoretically end up with zero builds with Russian Bla S Bul-Con, but that is pretty unlikely.
Turkey3: Con-Bul, Ank-Bla, Smy-Syr. "Let's R/T, the play it safe option". Loses tempo with getting that fleet out into the med. That isn't necessarily a problem, since you'll probably build F Smy anyway if things go well. But it's not as nice logistically if you're serious about R/T.
Turkey4: Con-Bul, Ank-Bla, Smy-Arm. ("Let's declare war on Russia.") I would rarely open with this one - you're pretty much gambling on an anti-russian opening from the Austrian, *and* a non-southern opening from Russia. If it works, bye bye Russia, but yeah. Low odds.
Italy1: Ven-Pie, Rom-Ven, Nap-Ion. ("Let's declare war on France".) It's... a weird option, and you're betting on Austria going east.
Italy2: Ven-Tri, Rom-Ven, Nap-Ion. Actually not *that* likely to succeed, a lot of Austrias will cover Trieste somehow.
Italy3: Ven-Tyr, Rom-Ven, Nap-Ion. Not necessarily any better than Italy2, but you get a few more tactical options depending on Austrian openings.
Italy4: Ven-Apu, Rom H, Nap-Ion. "Hey, Austria, let's play nice, but I'm watching my back".
Italy5: Rom-Nap (or Apu), Ven S F Tri, Nap-Ion. "Hey, Austria, let's play nice, but I'm paranoid and unsure."
Italy*: Nap-Tys instead plus any of the above. "Look, let's just avoid any paranoia about Greece, OK".
The real question for Italy in particular with many openings is Fleet Ion To Tunis, or Army to Tunis? That's not as obvious an answer as one might think. Usually it's the fleet. But if Austria is leaving Trieste empty and has Fleet Greece, then build F Nap, Nap-Ion, Ion-EMed, is a serious actual possibility, depending on Turkish opening and build. Not a settled question, either way.