“Do you have any preference on bass heads? Are any of them particularly good, or crap, or is it purely personal preference?”
There are more good ones than bad ones nowadays (like MTBs!) But I’m good at advising for specific needs – it really depends on the player, strings, bass, cab and required loudness and tone. It’s something I’ve tried to solve with handy flow charts or questionnaires but it’s too complex, too much fuzz logic. A few questions back and forth and I don’t often get it wrong!
It’s very much like bikes to be honest – what you love and what you hate are decent guides to what you need. But without fairly solid reference points it takes a lot more narrowing down…