@@Ganaram Inukshuk, I'll add my thoughts here too, haha. Going in order:
My thoughts on minimalistic/flat... I think it's a niche. It serves a purpose in key circumstances, and while it may face issues of representing certain things, or suiting certain tasks, it can also suit others extremely well. Basically, I enjoy it, but it's important to know when it serves a good purpose, I suppose.
Likes or dislikes... Simplicity is a major plus in certain areas. While detail can be pretty or striking, simplicity can focus on a core expression or facet much more exclusively, without getting weighed down by detail. So yeah, I like that it's clean, clear, and useful. I dislike it only when it's misused or simply fails to deliver an interesting or deeper piece when one would be desired (basically, it's situational).
Basically already touched on above. In my opinion, the major pros involve focusing on a core aspect or facet of interest, and conveying it without much fluff or distraction. Another pro is that simple designs just look more accessible and pleasant often. As a con, sometimes the fluff is what people want, or simplicity just doesn't cut it when you could use something a bit more dynamic or lively. Additionally, it can be hard to balance simple with interesting; it basically comes down to really needing to understand how to use your space, and avoiding boring empty/unused space even when your style might create it easily.
Preferred designs... depends on the situation and use, I suppose; no good answer for that from me.
I'd say it fits, yeah.
I'd look at other artists and try to study the nuances of how they make simple interesting and dynamic. Studying the success of others (or failures) really is key to progressing forward in my opinion.