I have a lot of my portfolio in Bonds inside my IRAs and my regular brokerage. Taxable in inside my IRAs/401k (LSBRX, PBDIX), and non-taxable in my regular brokerage.
I have some older very high interest paying individual MUNI bonds and have been adding some Funds and ETFs for diversity. $13,000 in DRTAX and $7,000 in PZA. I wish I had reversed the allottment between DRTAX and PZA, and will do that shortly. PZA pays a bit more and has a lower expense ratio and seems to be more predictable than DRTAX.