Tenten tilts her head to the right, a little curious about her new sensei, whom appears to be playing with her water transformed hands while waiting for Tenten's response, as if showing the entertaining and vivid points of Suiton.
It is obvious that Korra - san is enjoying her Suiton mastery and senseiship.
Tenten is putting on a confident face, even though trembling from nervousness inside.
Just that? Piece of cake Korra-san. I hope I won't dissapoint one of the best Suiton users in the Ninja World" She thinks to herself, opening her mouth afterwards and spewing out one big explanation in one big breath.
Suiton is probably most versatile elemental release (along with Doton), though it is more practical in offensive usage. The water itself is presented in multiple forms, solid/liquid/gas (some of which are Kekkei Genkai's available to a specific bloodline). Solid water related releases would be the Ice Release (Hyoton) or really compressed techniques that can be seen as a possible solid. Liquid form can be used in different forms, like the syrup technique seen in the first Kakuzu fight where the Konoha shinobi released a field that stuck the opponent onto the floor. Oil versions have been seen used by the toads and Jiraiya as well. As for the "gasses" I would refer to the mist usage of it, like the hidden mist jutsu and similar techniques such as Boil release. Both of the forementioned techs are also Kekkei Genkai's (different ratios of Suiton+Katon).
Depending on it's usage, water can be very deadly, defensive or even supplementary.
Suiton's obvious natural strength is against Katon. It mostly plays on equal terms with other basic elements besides Earth. Advanced usage of water release is shown within the village of Amegakure, some shinobi's are able to manipulate the weather aswell, more specifically, rain.
It's weak to earth release because it is more solid than water, being able to both stop it and even disperse it apart. Although not a weakness per say, lightning can be very deadly with water release if used in correctly or if struck by it when around water.
Now let's see how it interacts with other elemental releases;
Doton interaction: When normal waves of water collide with earth it simply disperses apart. When a highly pressurized stream is released, depending on the ranks, water is able to slice it in half. When water comes into contact with mud it causes the mud to become more liquidy, thus speeding up the process of traveling or simply, the overall binding.
Fuuton interaction: It plays on equal grounds, wind clashing against water would cause for a small tropical rain storm as the water is dispersed and blown everywhere. This depends on the nature of the wind technique. If it's a blade, it would cut the wave and continue, depending on the ranks of course.
Raiton interaction: Water can either absorb the lightning when clashing against it and simply defuse it as it spreads out and disperses in the large water source, or it can be used as a supplement to enhance the overall strength of water. This opens up the ability to combat it's natural weakness, earth release. With a lightning infused water technique the effects would be more potent.
Katon interaction: Depending on the ranks and heat levels of the fire technique in question it would either cause a large mist of steam from the evaporated water, or possibly heat up the water creating a water/fire combination that could scorch the target with boiling water.
Most prominent Suiton users are: Kisame Hoshigaki, Hatake Kakashi, Hozuki Suigetsu and Mangetsu, Senju Tobirama.
Known Kekkei Genkai's are:
Boil/Vapour release / Futton - a fusion of Katon and Suiton elements, seen used as an Taijutsu enhancer.
Storm release/Ranton - a fusion of Raiton and Suiton elements, energy-type plasma nature
Ice release - Wind and Water fusion