The following observations are generalizations I have made from seeing how my protestant friends/extended family members.
First off, even within the same denomination, it seems that each church has its own theology and church rituals.
Second, stemming from the first, it seems that many protestants generally aren’t as concerned with going to the same denomination as much as just going to a church they like.
Thirdly, Protestant sermons seem to have more personal wisdom/life stories than Catholic homilies, generally more casual it seems.
Do any of these generalizations have any truth?
Sure, and there are reasons these things are seen.
First - yes, Protestantism isn’t really one group. Even historically, there were really several “Reformations” that happened, all close to the same time. That is, several groups all broke away or developed out of the Catholic organization of the time. There was influence between these groups, they had some similar ideas, but also some different ones, and they came to separate from the CC under different circumstances.
So among Protestant groups, there are a few main streams of thinking that go back all the way to the Reformation. And since then, there are others that have developed from them.
So while there are some common threads between Protestant theologies, there are also significant differences. As an Anglican, I have a lot more in common with a Catholic than I would with a fundamentalist evangelical for example.
But this shouldn’t be a sunrise - the Catholic Church also has it’s own theological views.
Whether individual Protestants are committed to a particular type of group is a bit more tricky. Everyone probably has a list of things he would consider to be “basic” Christian teaching, and would want to find that affirmed, and nothing heretical affirmed. This is really just like Catholics - we all have a basic idea of what it means to be a “true Christian Church”.
For some that is very basic - maybe belief in sola scriptura, sola fide, scriptural inerrarancy, the Trinity, and the Incarnation. Such a person might feel at home in many parishes of many types, and so would feel free to go to the one that best fit his needs or preferences. Others might be very specific about something like apostolic organization. Some Lutherans require members to agree to the Lutheran confession of faith, and practice closed communion.
But the basic issue here is, many Protestants think all/most Christian Churches are part of the “True Church”. And that while some may be closer to being perfect than others, none are totally perfect (at least in the Church Militant.) So it makes sense they can go between denominations to some extent, just like you could go to an Eastern Catholic parish if you wanted to.
As far as homilies - this varies enormously, and I don’t think you could make many generalizations. Some groups have a tradition of long, in depth, Biblical exegesis, others personal/wisdom stories, others rhetorical manipulative stuff. And within denominations different preachers have different styles too. I would say I think there is more really good preaching outside the Catholic Church at this point in time than there is in it - at least in the West. I have heard some really good Catholic homilies too, and some horrendous non-Catholic ones,.