I am presently flying gliders as well as smaller sport models but have run the gamut of pattern- IMAC Quickie etc..
Trimming is a science to some and a religion to others
There are no secrets but there are some basic guidelines as others here have mentioned
A few other points :
1 Changing the speed range of the model changes the BEST trim setup
for example get setup as good as you can for a good easy to fly setup - then- with no other changes - either try flying everything faster or slower
You will find pitch settings are different - roll is different and ability to hold vertical lines different.

2 Changing the thrust setup (relative prop size ) has a more pronounced affect
for example
The typical glow setup (1.4 cu in four cycle ) which pulled a 14" prop had good response but some power spool up was always required.
A electric setup will pull more blade (and disc) and power response is instant- so no leading (early power application) required .
Some may say no -but try it - you will see.
It is simply because electric setups have max torque available at zero rpm.
The type aerobatic model YOU may like is a personal thing but it is possible to fly any sequence -very well -with scale models of good full scale aerobatic planes
Some people will insist you need to severely modify things to get pure yaw/pitch/roll
There are plenty of varients to choose from so the choice is yours
Just bear in mind -ALL of them are compromises
Nothing beats a lot of experience with many types of models -big -little fast or slow
each type lends more insight into what trim setup fits you the best.
And it is a hell of a lot more interesting and fun
and remember