What interests me so far is being underwater... although I am pretty confident I'll never pursue cold water (dry suit), tech diving or cave diving.
If some people are able to enjoy the hobby of diving over many years and never have to upgrade/replace gear good for them, but my history with hobbies indicates that's unrealistic.
I like the jacket style, the axiom specifically has worked well, I definitely expect dive travel so keeping bulk/weight in mind was a good tip.
I also do not like the jacket style, and have found that the rear inflate (such as Scubapro Knighthawk) give the un-encumbered feeling as a BP/W. I also have a BP/W and find it less practical than the BC, but this may be due to it having a large wing - I am waiting on a 23# wing to have another try. The reason I say this is often you need to try different gear and find what 'clicks' but this can cost some time / money. Much 'advice' on this forum will be BP/W this tends to drown out or push away other comments.
Note that you can get a complete HOG BP/W for about $US444 at DiveRight in Scuba Hog BP/W Full Set - Single - Dive Right in Scuba. I am not saying to get this just using as a price comparison.
A check on eBay and the used QD Pro is going for under $US100.