Liquid & Structured Credit

Haven't found much information about Liquid & Structured Credit Investing on this forum, so wanted to collect some thoughts on the space covering the following topics: 

• What make a good liquid / structured credit investor and who are the top 3 players currently?
• What opportunities are there currently in the space? (doesn't seem to be a great market atm)
• What are some typical trades / investments an investor in the space would be looking to execute? What are the key return drivers and risks associated to them?
• What have been the most unique or profitable trades / investments in the last 10 years? 
• What makes the space exciting to work in and how do funds position themselves to attract LP commitments? (since '08-09 LPs seem sceptical to commit to these strategies in my op)
• What are some key differences in terms of valuation / credit analysis / memo writing from traditional private credit / direct lending strategies?
• Are there any interesting developments in the space? New vehicles / trade ideas that have proliferated in recent months / years? 
• What are the most common investments in the space currently given all the macro/geo-political/bond market headwinds experienced currently?
• Are there any primers out there with which someone can get up to speed quickly? 

Would really appreciate any insights on the above and apologies for the long post.