The terminology is actually being phased out, especially in the medical community. "Good" and "bad" might be appropriate descriptors if you're just trying to get high and have fun, but they're not quite right if you're trying to work on yourself and your mental health.
Some trips are easy, some trips are difficult, and just like in real life, it's often the difficult journeys which cause us to learn and grow most.
Everything is just strange when tripping, from the things you see to human interactions to life in general- whether the strangeness is beautiful or terrifying depends on the trip, but afterward it can have a lasting (at least long after the drug has worn off) child-like appreciation for things that might've been mundane, boring, or tedious. How long this break from monotony, or revitalization lasts, is hard to say.
The experience was sort of like an extremely intense workout, or emerging from a sweat lodge- it was painful, but led to a sort of rebirth. It may be simply, when you're already in good spirits prior to tripping, the results are just less noticeable afterward.