Online Slot Gaming Bet Per Spin Variation Strategies Or Not?

Hello All!

I thought I would add a little thought-provoking banter into this fine forum and ask a question which I would imagine can make some interesting and are in seek of information for the inquiring mind.

What is the general consensus of changing your bets during an online slot session? Besides the obvious issue of either conserving or increasing your overall bankroll, what (if any) considerations most affect this? 

Do certain games possibly spark more of a tendency to double your bet at any given moment? For me, certain slot titles I play more often and have hit bigger wins on tend to be ones I'll play loose at times based on the way the game itself is 
"behaving" and indeed "misbehaving". 

I generally stay around the $1 USD per bet range as this is comfortable for me. With that said, I'll double that to $2 USD a spin on a game I'm familiar with or feel it's going to hit. I don't generally get the feeling an unfamiliar slot is going to hit but I will, from time to time employ extra bets when having a good night playing slots or gaming some live games like roulette or lately, Ultimate Texas Holdem and Casino Holdem. 

By the same token but on opposite ends of the spectrum, when my bankroll is running low I tend to cut my normal $1 USD bet in half to 50 cents. Rarely do I go below 50 cents?

Finally, sometimes but rarely employed is highly variable that fluctuates up and down. I think this strategy is a bit chaotic as you could get a huge win with minimal bets.

From my first-hand experience, I believe a good slot betting strategy should be employed as it does a few things. Change online slot machine bets add another dimension to slots play. I have received some of my biggest wins from this getting lucky and hitting a monster spin while betting double my using stake of only $1 USD. 

There are very few slots where an aggressive betting strategy applies in my book ranging from 50 cents to $5.00 USD and that is normally from the same providers. 

What is your preference? If so, why?