Since I've been spamming the board lately asking for info about anywhere and everywhere, I thought I'd do a mini round up of stuff I found in Indonesia over several visits (all August as school hols) - I've put the year I visited each place as things may well have changed since
Bali - The north
The Liberty wreck (2014) in the north is a lovely wreck dive - sunrise dives were offered where I saw school bumphead parrotfish, turtles & plenty of macro
Tulamben area (2014)- I'd never seen so much macro (and haven't since) - pygmy seahorses, harlequin shrimp, nudibranch everywhere, baby stuff (cuttlefish/angelfish/lionfish), ghost pipefish, tiny frogfish
All north dives done with a hotel dive school
(2015 & 2017) - stayed in Sanur, dived Lembongan - this was an error (as I found out on a later visit). Dive boats tend to leave Sanur and head to two main sights - Crystal Rock (in search of mola mola) and Manta Point (in search of mantas)
I've always seen mantas on every visit to Manta Point - the vis is ropey (as expected) and conditions can be very surgey and it's a very busy divesite with day boats etc. Crystal Rock I've never seen mola mola - what I have witnessed was a complete disregard for safety (his own and ours) in pursuit of a fish. Our guide told us to wait quite a way off the main rock at 40 m (we're both deep certified) whilst he swam down deeper (and out of sight) to try and locate a mola. At that point, my buddy had less then 20 dives and was very anxious about our guide disappearing without us.
(2017) - Stayed on Nusa Lembongan itself - LOVE this island, complete island vibe, quiet, clean, walks along the beach to mangrove areas (I'm slightly obsessed with kingfishers and saw them everywhere)
The day to day dives are nice - turtles/octopus/reef fish. We had one mad current dive and that was at a site called Mangrove - not a commonly dived site - the current was ripping to the point our guides dive computer came off and was lost somewhere on the divesite. Didn't enjoy that one at all.
Mola Mola - after a lot of dives at Crystal, during our stay on Nusa Lembongan we requested not to visit Crystal dive site at all - it's a fairly boring site without the mola (especially if the guide insists on sitting out in the blue and just waiting). Instead we plumped for a sunrise dive at Blue Corner divesite - staying on the island meant we could be in the water by 6:30 am - something I didn't see offered from the mainland - we were treated to two mola mola , one literally within a couple of metres of us, the other at depth but still visible - this was an awesome dive, we were completely made up, though we did find out afterwards that during the week that followed 10+ molas were on each sunrise dive, I was very happy with my two though
Gili Islands (2015 & 2017)
Pretty much all the same diving from all the islands as they're in very close proximity, island vibes are different though - Gili T is busy, loud and partylike, Gili Air is quieter with a more relaxed vibe. I've not yet visited Meno but believe it to be the quietest of the three islands.
The diving is really nice - currenty in places (and sometimes stronger currents than Komodo), but plenty to see - literally turtle heaven (seeing 8+ turtles on a dive is normal). I noticed a big drop in shark spotting between 2015 and 2017 (I don't know if that decline has continued). We went here prior to a trip to Komodo (my other half had 20 ish dives and very little current experience before this trip so was a very good warm up for our Komodo liveaboard
Komodo (2014, 2015, 2017 twice)
I adore the diving here and would always recommend a liveaboard to get to those further out sites (and to not be tied to a busy divesite - as liveaboards have the flexibility to rejig timetables to avoid a site if its crazy busy.
The currents - everyone thinks of Komodo as ripping currents and strong drift dives - I've now been 4 times and have to say it all depends on the moon phase - in 2016 we were there 8 - 11 August (for anyone wanting to look up moon phase) and comparably the currents were very gentle, some sites had none at all - to the point a famous drift dive (Tatawa Basar) had no drift at all - meaning it could be explored more thoroughly (it's a favourite of mine so I was more than happy with this)
Favourite Komodo divesites for us:
Tatawa Basar - beautiful - coral, fish, colour, vibrancy - just stunning
Batu Balong - Pinnacle - can go deep for sharks, turtles, coral, colour, macro
The Cauldron/Shotgun - mantas/sharks/rays/turtles - but the 'highlight' of this dive is the shotgun - an area of the site with strong current and you just fly through, the shotgun itself is only 9m deep so not too scary- again, current strength varies.
Crystal Rock - really good dive, strong current and quite deep (30m) - but it's all about 'sitting down' in the current and watching the show - sharks everywhere (big grey reef, loads of white tip)
A word a warning though, get appropriate insurance, including repatriation, it is remote. I was witness to the aftermath of a dive accident, which proved fatal, which has made me VERY aware of not skimping on insurance - she didn't have the correct insurance and repatriation was a huge issue for an already devastated family.