Just wondering how the more experienced anglers attach their fly, currently i tie mine but have seen some hoops that you tie to your leader and then just attach the fly hook eye.

I should imagine the hoop is quicker for fly changing, but what about presentation?

I think they are great for not chopping down your tippet with multiple changes, but having tried them I found it far from quick to change flies, its quite fiddly with smaller glies and connectors to unsnap the fly, particularly on a cold or rainy day. It ended up actually being quicker to tie a new one on.

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Around the steel no tortur'd worm shall twine,
No blood of living insect stain my line;
Let me, less cruel, cast feather'd hook,
With pliant rod athwart the pebbled brook,
Silent along the mazy margin stray,
And with fur-wrought fly delude the prey