Practicing with loops is a great way to work on your phrasing, musicality AND timing, all at the same time. It also helps to build vocabulary within a specific musical context instead of just within blank pulse. It's also way more fun than playing to a click.

My obsession at the time of writing this was with 5 note groupings, as 16th notes, repeated over a two bar length. To make it easier to practice, I created a 2 bar loop with a similar 'feel' (5 note groupings) but with defined regions (bars) - that way when I inevitably get lost, I have a very clear 'jump in' point to get back on track - time saver hack!

Check it out: