Angus had a great post. Just one thing I would add about TW is that TW is really a
dead-end line. It is really a lot of fun, but you should wait until you need a break from
the BB or CV line, you'll be able to level up fast into TW by power-levelling a BO and
levelling your torpers to tier 3 torp level in an AA ship.

Guide on bulge.

http://www.navyfield.com/board/view.asp?Num=180593&Sort=D07

Beware, wall of text. Just fit as much bulge on as you can before your speed goes
down.


Potential stat....

http://www.navyfield.com/board/view.asp?Num=84358&Sort=D07

Like all the other stats, explained here.


Pros and con of IJN SS/BB/CV...

I cant say much for SS and CV, but I'll say what I can.

BB Pros
massive firepower for their tier (amagi/SY/yamato/fuso/ise)
decent firepower for their tier (kongo/nagato)
good/decent speed for their tier (all?)
great AA
generally fun ships if played correctly
great AP effect for 45 degree angle guns
Fun/great EBBs
medium/good range

Cons
Fragile
only 1 major line
hangtime (amagi!!!)
Useless Premium ships (PBB,PCA,PCL)
delay classing AA gunner questions


CV pros
lots of choices
starts at lower levels

cons
really don't know.


SS pros
firepower

cons
slow
T4 only has front torp tubes


TW pros

only nation "allowed" to TW
great TW line of ships.
good torps (range, damage, or speed)

Cons
expensive
monotone playstyle


Personally, I'd take a look at your playstyle first, then choose a nation/ship line...