Bad as they are, I used to like playing Q8 off/on suit and more recently A & a low number card (say 9 or less) on suit. I know these cards are pretty raggy, but do any of you often find yourselves playing similar duff cards on the back of large/sentimental previous wins?
Having favourite hands is more of a goofy thing to do in order to reduce boredom. Many professional players have such favourite hands because they'we been playing for many years and can afford it.
The problem with having something like this is that you immediately lose objectivity. Emotions must be avoided at all costs in the context of poker; having a favourite hand is included in this rule. Poker is something cold and calculated. The only good emotion is some sort of cold, distant empathy, because it can help predict what your opponent(s) will do in the short and medium run.
After many thousands of hands, you will get into situations that will be memorable. That's how the brain is built to work. That's when you'll have the tendency to start loving or hating certain hands. CRUSH THAT !! Because it's wrong. That hand was good or bad in that particular context and situation. That's it, nothing more (or you played it wrong :D ). Given that poker does have a luck factor, it only inforces my argument.
There are plenty of scenarios in which it is more than OK to play hands like Q8o, Q8s, and definitely Axs. There are also plenty of scenarios where you should be folding these hands rather quickly.
Whether or not you do fold them should be completely independent of sentimental wins and losses. Instead, play them or fold them because it is the most profitable option to do so.