Content is neat, but layout is a little bland. Especially in terms of trying to put forth a professional image, I think there is still room to improve - clarify

Content is neat, but layout is a little bland. Especially in terms of trying to put forth a professional image, I think there is still room to improve - clarifying the header in a nicer way, making your footer cleaned up. Nothing too hard to do, though - probably minor tweaks to a lot of themes could help. I'm not sure that moving to Tumblr or Posterous would help, except insofar as the #1 thing about a blog: would they help you to write more / better? If so, go for it, since you could have a nice user experience there as well. In any instance, I'd say it's worth paying $10 a year to get your own domain to mask wherever you are - whether rakhi.blogspot or .posterous or .tubmlr. One easy to implement suggestion: for a site like this, a "read my best-of posts" section can be really helpful to engage new visitors and make them repeat visitors by seeing the best you have to offer.