I've had my PP-ASEL for 6 months now. I'll asterisk the ones I won't do:
I won't fly if...
...the wind is more than 10 knots (in any direction!).
...the ceilings are below 4,000'.
...the runway isn't at least 5,000' long.
...the runway isn't at least 75' wide.
...over water.
...over mountains.
...at night.
...in a single.
**...to a grass field.
...to a class D airport.
...to a class C airport.
...to a class B airport.
...to an uncontrolled field
...in IMC (even when IR rated!)
...under VFR
...if I can't stay in radar contact.
...more than 50 miles from home.
...in the winter.
...outside gliding distance of an airport.
That's my only real "restriction" and it has less to do with a "won't land at a grass strip ever" (I realize the chances of a grass strip being in bad enough condition to cause a serious problem are minimal at worst) with "can't see a good reason to do it". I just don't see the allure a lot of people do in landing on a rough strip of grass. Quite a few of you all look at it as something nearly akin to a religious experience, but that's the beauty of freedom: you're entitled to your opinion and I'm entitled to mine.
Several of the others (IMC, mountain flying, etc) are obviously not options since I'm not in possession of my instrument rating, etc. Beyond that, I evaluate everything on a case-by-case basis. As for runway width and length, it's just a matter of personal preference to stick with the larger runways, but if I have no other choice or the rewards of landing at a small field are sufficient, I'd do it so long as I have a reasonable chance of being able to perform it safely.
You can do fun and interesting stuff in the meantime or sit on the couch with bubble wrap taped around you.
I always remind people that not getting off the couch or even out of bed carries with it a separate set of risks (blood clots, coronary events, bed sores, intractable boredom, etc).