Well i like classic long live game (30/30 or 45/45). Here is where you can lose the game just because you are a pawn down or lose the game because you are mentally tired.
blitz is not good for starters but its good to see your understanding of that opening & etc.
bullet is not my thing. Either i cant think fast or get lagged. Personally i think bullet is bad as you move fast (not chosing the best move) and it becomes a bad habit over time. However, not all about is bad. It's also very good test yourself in opening theory and understanding of it.
Long live chess win hands down in my opinion.
BTW, i see that you are very good at bullet. What is the secret?
Which game type do you think is better firey blitz blazing bullet or a classical battle to test calculation. You choose!