The first time I ate acid was like a Friday after class. I asked my dude, "how long do these take to kick in?" His response was "generally 20 to 30." So, my drive home from school was about that and I decided it would be a good idea to put a blotter on my tongue with about 15 mins left before home.
I got home, said hey to my Dad and told him I was layin' on the couch to catch up on some sleep. In reality, I meant "I'm layin on the couch while I test this acid."
Point being, I've tripped alone in the house plenty of times (alone = only one trippin). The first few times were really fun, the patterns on tile looked ridiculous; my sister's water color paintings looked out of this world. Hell, I even would walk around at like 3am with headphones on just noticing how all the patterned things throughout the house were movin'. Also, I can't sleep when I'm on acid. Not even close, doesn't matter how bored I am.
After staring at everything, eventually it did get a little boring but ANC is right in that mental energy can be channeled to improve one's self, or heck, think outside the box about anything. I scribbled an outline for a paper once on 'cid (awful hand writing), but good take on the topic.
In the "end", I decided that I like doin acid and being outside. It more fun walking through nature than pacing through my house (cid gives my legs energy).
My opinion: acid gets along well with my mind. my mind can trail of into the meaning of life as oppose to something more serious and emotional. Shrooms tend to make me emo, and at this point I've explored enough of my character flaws; when I trip I just wanna stare at shit and talk about the existence of pink elephants, not get hard on myself for not working my ass off.