Hi Sleeper, from your post seems like you will be happy with organic shaped yoyo about high walls and similar.
Low walls help to play horizontal, do not tilt the yoyo easily and also give more space to the string (it will be easier to catch it after slacks), they guarantee so much more balance compared than a high wall yoyo.
Wide gaps, if you intend the bearing gap than it help to do many layers of strings, when you start to do hard and complex combos it can happen to layer lot of string around the bearing, a wide gap help to avoid snagging and accidental bind (which is so annoying), other than that it helps when you do tricks where you go “against the natural rotation” of the yoyo, still avoid the snag.
Wide yoyos, help a lot with the modern trick set in competition, a wide yoyo not only guarantee a great visibility but also help you in hard catches like with all those Eli hops tricks around the body, lot of horizontal play, slack and rejections in general, it can be penalizing a bit if you play tech as with very wide yoyo it can happen that you have the yoyo halves in the middle when you have a dense string situation during the trick but generally a wide yoyo helps a lot to make your competition tricks easier to catch, also hooks and whips, it require less precision which in a contest setting is a big help as you trying also to over come the stress of the competition itself.
NSK bearing are just smoother in general, quiet and do not block easily, the shape is the same as some bearing you find around but the quality is quite different and they last very long, my favourite are the DS bearings, they not only very smooth but also have a different design which help the string to slide very smoothly, also while I break thousand of “normal” bearing but now I did not lock any DS bearing, if one day you can grab one, do it, at least out of curiosity, I will leave behind the ceramic, they are just a pain for no improvement.
About what you use, go for it mate, is more important the tricks than the hardware you use, hardware can be improved all the time easily saving money slowly, concentrate on the tricks and what you enjoy, the yoyo brand you use is not important, in Magicyoyo I tried several incredibly good models for a little price, imagine I have even been sponsored by them years ago, keep doing what you doing and enjoy